This Number is Crucial to Your DNA Match Research

Another day, another look at my mom's DNA match list. This time I wanted to find the first still-unknown person in her list worth researching. A video by DNA expert Diahan Southard encouraged me to research a match who shared a long segment of DNA with Mom. That means looking past the total number of shared cM to see the longest "segment" of shared cM.

You can find the longest segment length by clicking the amount of shared cM to see more details. This is true on most if not all DNA websites.

Increase Your Odds of Success

I began this exercise by looking only at matches who showed a family tree. A quick look at a few trees told me who they were. "Oh, that's my 3rd cousin through Immacolata Leone. Noted."

The match I chose to research has my great grandmother's maiden name in her family tree. Saviano. I'm always interested in finding another Saviano. And they've been hard to find.

This match shares with Mom a longest segment of 27 cM. Diahan Southard didn't specify a longest-segment range worth researching, but her example showed 32 cM. So 27 cM is pretty close.

Do the Research Yourself

First I had to figure out my connection to her ancestor, Giuseppe Saviano. This match supplied an exact birth and death date for him in her family tree, but no locations. I knew the dates would be a big help.

A search on Ancestry told me Giuseppe came to America and lived in Cleveland, Ohio. I know lots of relatives who wound up in Cleveland, including my father. I found Giuseppe in someone else's Ancestry tree. He had the right dates, Cleveland as his place of death, and San Nicola, Salerno, Italy, as his place of birth.

My absolute first thought was, "I wonder if he was really born in San Nicola Manfredi." (That's in Benevento, not Salerno.) Why would I think that? Because that town borders the town where my Saviano ancestors were born. I know there was a decent cross-over between the two towns. And I have all the San Nicola Manfredi vital records at my disposal. I've found many familiar last names in the San Nicola Manfredi vital records.

So, was Giuseppe Saviano actually born in San Nicola Manfredi on 1 Jan 1889? Check the documents—yes! Here he is. And Giuseppe's U.S. World War II draft registration card confirms he was born in San Nicola Manfredi on 1 Jan 1889.

Researching a DNA match led me to 5 more children of my 3rd great uncle. They were born in another town.

But the true brick-wall busting moment came from the other facts on that birth record. Giuseppe's parents were Giovanni Saviano and Giuseppa Sarracino. I know that couple! They're in my family tree!

In my tree I saw Giovanni was my 3rd great uncle. He's one of only two siblings I've found for my 2nd great grandfather, Antonio Saviano. They come from a hamlet called Pastene in a town called Sant'Angelo a Cupolo. The town was part of the Papal States, so they didn't keep civil records before 1861. Don't get me started on that. I could cry at the dead ends that causes me.

I'd already found 6 children for Giovanni and Giuseppa. They were all born in Pastene or in greater Sant'Angelo a Cupolo. One of their daughters came to America in 1898 with my 2GG Antonio Saviano and his family. She died in 1901. But I don't know anything else about the other children.

Expand Your Search Area

Thanks to this DNA match and a hunch, I now know Giovanni Saviano and Giuseppa Sarracino moved to neighboring San Nicola Manfredi. Or maybe the borderline moved and they stayed put. Either way, they had 2 more sons in San Nicola Manfredi in 1889 and 1890. I went through the birth records year-by-year looking for more. What I found tells me that Giuseppa died and Giovanni remarried and had 3 more children.

I wish the last 3 were born at the same address as the previous 2, but they weren't. I do know this Giovanni Saviano is the only one around who's having children during these years. And, like his brother (my 2GG), his occupation changes all the time:

• 1875–1880: farmer
• 1882–1885: merchant
• 1889: shopkeeper
• 1890–1896: industrialist
• 1898: farmer again
• 1901: shopkeeper again

The best thing about this discovery is that I've found Saviano cousins with roots in Ohio.

Lessons Learned

What lessons have I learned from this research?

1. Don't frustrate yourself with DNA matches who show no family tree. Unless their shared matches have a story to tell, you may get nowhere.
2. You may not find your connection to a DNA match with a short "longest segment." I don't know where the cutoff is, but you've got a better chance of success if their longest segment is about 30 cM or more.
3. When your DNA match's family tree has sparse details, research their ancestor yourself. You may be more interested in genealogy research than they are. Or they may prefer to limit how much information they put out there.
4. Spend time with online maps. Know the names of the towns surrounding your ancestor's town. Take a peek at records for neighboring towns to see if any last names are familiar to you.

I'm thrilled to make some kind of progress on my mother's dead-end branch. While I can't see vital records from their town before 1861, I may find traces of my family in neighboring towns.

Digging Into a DNA Match's Family Tree

A while ago I uploaded my AncestryDNA test results to Geneanet.org for free. I like their website because I can upload a complete replacement tree after I do a lot of work on it on my computer. (See "A Major Family Tree Change to Fix an Ongoing Problem .")

The good thing about having my DNA test on that site is access to European DNA matches I may not find on Ancestry. I don't have any close matches yet, but one match, Giovanni, has a family tree that reeled me in right away. I recognized the last names as coming from Circello, Italy. That's the hometown of my 3rd great grandfather Francesco.

I've been spending time making a searchable database of Circello vital records. They records are all available on the Antenati website. (See "How to Use the Online Italian Genealogy Archives.") On Saturday I randomly noticed a man in my tree from my paternal grandfather's hometown. I saw that he married a Circello girl named Pasquala Gigante in the 1890s, so I decided to build her family. And I got very far. I added all 8 of her great grandparents and 6 of her 2nd great grandparents.

Finally I had a strong reason to use my vital records database for the town of Circello.

Pasquala has no blood relationship to me yet. And her husband is the cousin of the husband of a cousin. I would love to find a true connection between Pasquala's Circello family and my own.

Find Your Entry Point

When I saw Giovanni's family tree on Geneanet, filled with Circello names, I had to investigate. Could I find a way for his tree to connect to mine? As I clicked around his tree, expanding different family units, my mouth fell open. There was the very same family I'd built into my tree earlier that day! The woman whose family I added to my tree, Pasquala Gigante, is my DNA match's great grandaunt.

Giovanni's family tree is very impressive. It goes back so far that I can tell he knows how to get the most out of Italian vital records. (See "The Italian Genealogy Goldmine: 'Wedding Packets'.") I can use his tree as a guide while I view the town's vital records to confirm names and dates. I'll start by adding Pasquala Gigante's siblings. I'll find spouses and children, and put lots of families together using the vital records.

After hours of piecing together Circello families, I still don't know why Giovanni is my DNA match. This is common with people whose ancestors spent several hundred years in a small town. Once again, I believe our shared DNA comes from the soil itself, and not a specific shared ancestor. (See "What Good Are Distant DNA Matches?")

With 3 key points, you can expand your family tree and tie into that of your DNA match.

How to Get Started

Even though I haven't solved this ancestor jigsaw puzzle, I enjoy the daylights out of this type of project. And you can, too. Here are the basics for diving into your DNA match's family tree:

1. Concentrate on DNA matches with a multi-generation family tree. There's no use wasting time on someone with a 1-person family tree. And they're out there.
2. Search every branch for familiar last names and places. If their hometown is one of your ancestral hometowns, you need to explore some vital records.
3. Find a solid starting point. I was lucky to spot someone I'd added to my own tree hours earlier. Be sure to choose a person with lots of data points: a birth date, spouse's name, parents' names, children's names. Those extra facts will help you make a positive ID.

You may find, as I did, that your DNA match has connections to your family tree even if there's no direct relation to you.

What Good Are Distant DNA Matches?

I've recently added more than a thousand people to my family tree from one town—Pesco Sannita, Italy. And I've barely begun to harvest the vital records. I'm eager to use the new families in my tree to connect to my unsolved DNA matches.

That's the exercise for today. I went to my DNA match list on Ancestry and searched for people with the name Pennucci in their trees. I chose that name because it's common in the town and my 3rd great grandmother was a Pennucci. I selected the first match who wasn't my father or someone from his 1st cousin's family.

I've looked at this match's tree before. It's a good one—46,234 people. But checking how his ethnicity compares to mine, I see that he's only a quarter Italian. That means a big chunk of his family tree has no connection to me.

My jumping-in point in his family tree is his great grandmother Immacolata. I recognize my match's last name (it's also his great grandfather's name), but it doesn't come from my target town. His grandmother falls into the sweet spot. Her 1902 Pesco Sannita birth record is available on the Italian ancestry website, Antenati. (See "How to Make the Best of the New Antenati Website.")

I pulled up Immacolata's birth record and discovered she's in my tree already. She and I don't have a blood relationship. Immacolata (who's mother was a Pennucci) is the 1st great grand niece of the wife of my 4th great uncle. I've already built Immacolata's family tree back 5 or 6 generations. What more can I do to establish a true relationship to this DNA match?

I realized Immacolata is in my tree because of a previous attempt to connect to this DNA match. Now I need to search the vital records for her siblings, aunts, and uncles to see where it takes me.

I get the impression some people think the only way to use the Antenati website is to search for a name. Not true. Not every record is searchable. You need to navigate to your town and to each year's index pages to scour them for the name you want.

But I'm the lunatic who downloaded entire towns when it was possible. Then I renamed each document image on my computer to make them truly searchable. For me, it's easy to search the vital records for someone's siblings, and their parents' siblings.

Swimming in the Same Gene Pool

I built out several families related directly to Immacolata with no breakthrough. Then I looked at our original relationship: 1st great grand niece of the wife of my 4th great uncle. Immacolata's 2nd great aunt Agnese married my 4th great uncle Giuseppe. That's something like "crossing the streams" in the Ghostbuster movies. Their marriage created people who carry DNA like mine and like my match's.

What I haven't mentioned yet is that this DNA match, the great grandson of Immacolata, is in my 5th–8th cousin range. We share only one segment of 17 cM. Our shared roots are in a remote town where families intermarried for centuries. There's a very good chance that instead of a pair of shared ancestors, we have DNA from the same community pool.

I've been thinking about this notion for a long time. I haven't put it out there because it seems evasive and hard to put into words. It started taking shape when tests showed that my parents share DNA—37 cM across 4 segments. They could be 3rd to 5th cousins. But they aren't. I can name their ancestors and they're all different. (See "When DNA Says You're Related, You Determine How.")

Here's what I think. My documented ancestors, going back to the late 1600s, lived in neighboring towns, laid out like links in a chain. Each town is small, and even with modern roads, it can be hard to get from one to the next. (I know from personal experience.) That led to centuries of intermarriage within the towns or between close towns.

Doesn't it make sense that deep roots in a small geographical area result in shared DNA?

All those neighboring towns produced generation after generation of people with shared DNA. You know how the big DNA companies compare your DNA sample to a reference panel? The panel consists of DNA from people with roots in one place for several hundred years. Well, that's me! Until my recent ancestors came to America, my people were tied to one spot for centuries.

Studies show that the characteristics of a place exist in its people's teeth and bones. Is that why you can "feel it in your bones" when you arrive at the place your ancestors came from? I believe my parents and I, and many of our distant DNA matches, share the characteristics of the place we come from. That's why we carry some identical DNA.

We've been simmering in the same pot for centuries!

My DNA match, great grandson of Immacolata, has DNA from a mixture of Pesco Sannita and a town 9 miles away—Molinara. I get all my DNA from a mixture of at least 7 towns in the same area. We have the very soil in common.

Adding Up Your Ancestral Roots

I took a tally of the birth places of my 1st through 3rd great grandparents—all 42 of them. Here's my percentage of roots in each town. (The 7th town, Circello, doesn't appear until a pair of my 4th great grandparents.)

• Colle Sannita 40.48%
• Baselice 23.81%
• Pastene 21.43%
• Pesco Sannita 7.14%
• Santa Paolina 4.76%
• Apice 2.38%

Seeing this list in order justifies the extensive research I've done. I've completely harvested the vital records of Colle Sannita and Baselice. I've worked everyone possible into my family tree. I've harvested Pastene's limited records, too. Now I'm working my way through Pesco Sannita. Obviously Santa Paolina and Apice will be next, then Circello.

This type of relationship to my distant DNA matches changes how I view them. I don't expect to find a common ancestor with most of them. But I do search their family trees for marriages without documentation. Immacolata and her family are in my tree, but there's no documentation of her marriage to a man from Molinara. It's my match's tree that holds that detail.

If your family tree has no non-parental events and few missing ancestors, you may ignore your DNA matches. I encourage you to review matches with decent-sized family trees. What are they good for? They may contain the marriage that brought your great aunt to a new country. They may help explain a great uncle who seemed to disappear from his hometown. They can extend your tree's dead ends.

Do Your DNA Ethnicity Results Make No Sense?

Two people contacted me lately about an odd ethnicity in their DNA results. The three of us share ancestry in my grandfather's hometown, so they wondered if I'm seeing what they're seeing. I'm not, but I have a few curious results, too.

That's why I was excited to join another Diahan Southard webinar titled "DNA Ethnicity Estimates: How to Actually Use Them!" One of the most important things I learned was, basically:

If your results show less than 5% of an unexpected ethnicity, it's probably not reliable.

Here's how to get a better idea of its reliability. I'll use AncestryDNA as an example, but most DNA websites have similar tools.

• Click on the unexpected ethnicity in your results. I chose my mother's unexpected 2% Portugal.
• This opens a panel that tells you a bit more, such as "Primarily located in Portugal; Also found in Spain." Their map tells me this ethnicity may cover Spain's whole west side.
• Now look at your percentage. In this case, it says 2% Portugal, but beneath that it says it "can range from 0% to 5%." That's right. It's as low as 0%.

I've documented my mother's ancestors in a small area of Southern Italy going back to the very early 1700s. Could someone have come from Spain or Portugal before that? Sure. And since FamilytreeDNA tells me I have 6% Iberian Peninsula, there probably is some ancient connection.

But that doesn't matter to my family tree, does it? I'll never make a documented connection to a centuries-old ancestor from Spain or Portugal.

My father's results have a laughable result of less than 1% Norway. Less than 1%! When I click it I see that his estimate is 0%, but it can range from 0% to 1%. That sounds like we can disregard it, don't you think? He has no Norway on MyHeritage.

In fact, all Mom and Dad's ethnicities but Southern Italy and Northern Italy could be as low as 0%. The same is true for me, with one exception. Even my Northern Italy could be as low as 0%.

Dig deeper into tiny, unexpected ethnicity results.

AncestryDNA says the DNA samples they test you against "divide the world into 84 overlapping regions and groups." I can see that what they're calling Southern Italy and Northern Italy overlap close to the area we come from. Taken together, this makes me confident we are Southern Italy, going back at least as far as the paper records go.

But, if you *don't* know where all your people came from for the last 300+ years, pay attention to your unexpected results. They may be the clue you need.

A Range of Ethnicity Results

Why would AncestryDNA tell me my Northern Italy is 8% but it may range from 0 to 39%? This is from their website:

"We compare your DNA to a reference panel made up of DNA from groups of people who have deep roots in one region. We look at 1,001 sections of your DNA and assign each section to the ethnicity region it looks most like."

They look at 1,001 different sections of your DNA! Your DNA isn't one homogeneous strand. Each section can show a different percentage of an ethnicity. That means that my 1,001 test results for Northern Italian DNA ranged from none to a high of 39%. The average of all the tests was 8%.

Where the Action Is

For a long time my AncestryDNA results didn't show any of what they call Communities. Now I have three that either touch or overlap one another. And they are 100% true to my documented, massive family tree.

From Mom's side:

• Avellino & Southwest Foggia Provinces
• South Benevento & North Avellino Provinces

From Dad's side:

• Campobasso & East Isernia Provinces

I can prove that our documented ancestors are from the Benevento & Avellino Provinces. AncestryDNA bases these communities on the family trees of DNA matches. And they're very accurate, according to DNA expert Diahan Southard.

My husband's AncestryDNA test has a disappointingly low number of DNA matches. But I love his community! It fits everything we know about his ancestors: "Hiroshima, Yamaguchi, Fukuoka, Olta & Kumamoto." Here's what Ancestry says about how they determined this as his community:

"You, and all the members of this community, are linked through shared ancestors. You probably have family who lived in this area for years—and maybe still do."

I'll leave you with another great tip from Southard. Say you're trying to trace a close ancestor—a 2nd great grandparent or closer. And you have no idea where on earth they came from.

Do you have a DNA ethnicity that doesn't match what you know about your ancestry? Check your mystery DNA matches' ethnicities. (On AncestryDNA, Ethnicity is a tab, like Shared Matches.) Do any of these matches have a decent amount of that one unexpected ethnicity? Check their family tree and Shared Matches to see if their information that can help you.

Also, take a look at which ethnicities you actually share with your decent DNA matches. If they don't have small amounts of something you have, then that ethnicity has no bearing on your connection.

What's the bottom line with all these ethnicities?

• Be sure to check out the range of percentages. If it says it's as low as zero, it's may be too little to matter.
• If the average is below 5%, don't expect to find a documented ancestor from that part of the world.
• Check to see how your DNA matches' ethnic percentages compare to yours.

If some of your DNA ethnicity results simply don't make sense, give them a closer look. If you can see they're not worth pursuing, don't worry about them.

Here's a good way to look at it in mathematical terms:

• Each of your parents gave you 50% of your DNA.
• Each of your grandparents gave you 25% of your DNA.
• Each of your great grandparents gave you 12½% of your DNA.
• Each of your 2nd great grandparents gave you 6¼% of your DNA.

A tiny percentage is either a statistical error or a very distant ancestor.

I know exactly where all my 3rd great grandparents came from, as well as 55 of my 64 4th great grandparents. It's crazy to imagine that one of my nine missing 4th great grandparents walked to Southern Italy from Norway or Portugal! That gives me the confidence to ignore those trace ethnicities.

How about you?

Don't lose any sleep over tiny, unexpected DNA ethnicities.

And speaking of DNA:

• Making Sense of Your DNA Results
• Delving Deep into Your Genealogy with DNA
• The DNA Problem We Aren't Talking About

These DNA Sites Expand Your Tree in New Directions

Ten years ago I asked my parents to take a DNA test. I told them it would help me see whether my matches were on mom's side or dad's side. I even uploaded our 3 DNA tests (plus my husband's) to other DNA websites.

I must admit I've spent very little time looking at their DNA matches. Instead, I've analyzed the daylights out of my matches. I've categorized them, added notes, and grouped them with colorful dots.

Then on Friday, DNA expert Diahan Southard gave another insightful webinar. She recommended two things I've overlooked:

1. My parents are one generation closer to their ancestors than I am. So they will have some matches I don't have.
2. AncestryDNA has the most tests by far, but they ship to a limited number of countries. (See the full list.) Other websites, like MyHeritage, have a more global collection of DNA testers.

After hearing that second point, I was eager to see our matches on MyHeritage. Sure enough, I'm seeing matches that aren't on AncestryDNA. They're from:

• Italy
• Brazil
• Australia
• United Kingdom
• Venezuela
• Slovakia
• New Zealand
• plus the USA and Canada

I didn't realize how AncestryDNA limits my international pool of matches.

You can do this for free, same as I did. Create a free account on www.myheritage.com, go to the DNA menu, and choose Upload DNA data. (See your testing site for instructions on how to download your DNA data file.)

I'll bet you'll have much better matches than I do. For some reason, my number of matches is very low compared to other people. On AncestryDNA, I have 5,554 matches. I've seen other people with 50,000 matches. What the heck? On MyHeritage, I have 554 matches—but 90% of them are people not on AncestryDNA.

I spent a whole day looking at the family trees of DNA matches for my parents and myself on MyHeritage. The most exciting result is that many of them are from my mother's ancestral hometowns in Italy. Those towns have almost no matches on AncestryDNA!

Don't overlook the free resource that offers you a host of new international DNA matches.

I recognize most of the last names in these matches' family trees. I dug through my downloaded collection of vital records from the towns. I built out families and placed my new DNA matches in my family tree. Sometimes our connection was an in-law connection, not a cousin connection. That means I need to piece together more ancestors.

While my number of international DNA matches is low, they give me a lot more families to explore. I'm excited to have a new project on my list. Yes, I'm still winding up a cleanup project to add source citations to some document images in my family tree. But I can wrap that up in three solid days. And I'm still working through my maternal grandfather's hometown, adding people to my tree. And I'm even still renaming lots of my downloaded vital records to make them searchable.

But that doesn't mean I'm not excited by the next big project! Thanks to my international DNA matches, I can expand my reach into my "underserved" towns:

• Sant'Angelo a Cupolo
• Apice
• Pescolamazza
• Santa Paolina
• Tufo

I'm also revisiting the DNA kit I uploaded to familytreedna.com. That match list (only 321 people) has even more names I haven't seen on AncestryDNA. Very few of them have uploaded a tree, so I may not get very much out of this list. But again, I'll bet you will.

I'm eager to add as many people from my underserved towns as possible. My family tree is full to the brim with ancestors from my grandfathers' hometowns. But my grandmothers' lines need work. Now I can expand their families further!

If your family hasn't been in the U.S., U.K., Canada, Ireland, Australia, or New Zealand for several hundred years, don't ignore the power of MyHeritage. And if you're managing DNA kits for your close relatives, explore their unique matches. Go ahead. Dip your toes in the international gene pool.

This Spreadsheet Sorts DNA Matches By Branch

If it's at all possible, get your close relatives to take a DNA test that you will manage. Choose someone from your maternal and paternal sides. If you can't test your parents, how about a half-sibling or a 1st cousin? Once they've tested, get ready to see all your DNA matches in a new light.

I'm so glad my parents agreed to take a DNA test. At first I asked them to test so I could more easily see which one of them was related to my DNA matches. Now AncestryDNA is doing that for us with their SideView™ feature. I figured I didn't need this feature. But I was wrong.

While watching videos from RootsTech 2023, one big thing dawned on me. You see, my parents are on each other's match lists. After so much digging, I'm sure they don't have a common ancestor who lived before the late 1700s. But I never thought to look at my parents' SideViews.

Looking at SideView from My Parents' Perspective

The result was pretty exciting. When I looked at Dad in Mom's match list, I saw:

• their relationship falls in the 4th–6th cousin range
• they share 37 cMs
• their longest segment of shared DNA is 14 cMs
• Dad is on Mom's paternal side of the family

That last item is great news because Mom's maternal side of the family dead ends too early. That ancestral hometown was a Papal State in Italy, so it didn't keep civil records before 1861.

When I looked at Mom in Dad's DNA match list, they still shared 37 cMs with the longest segment measuring 14 cMs. But, unfortunately, SideView shows Mom as Unassigned. Ancestry says this could mean there isn't enough information to assign Mom to one of Dad's parents. Your Unassigned matches may get updated in the future, so keep checking.

Analyzing DNA Matches in a New Light

It was Kelli Bergheimer's RootsTech presentation "DNA Misconceptions" that inspired today's project. I created a spreadsheet to compare my DNA matches' relationship to each of my parents and me.

I started by adding the names of my DNA matches in column A of a spreadsheet. I went from the top of the list down to my 44 cM matches. After 44 cMs my matches fell into the Distant Family category. I noted:

• how many cMs we shared
• whether a match is on my maternal side, paternal side, both sides, or unassigned

Then I went through each of my parents' match lists. I captured their matches down to a 44 cM match. If their match wasn't already in my list, I added a new line to the spreadsheet. I checked each of our lists for everyone in column A, noting shared cMs and which side of the family.

When all your maternal DNA matches are on Mom's list, and all your paternals are on Dad's list, you know you've found a cousin.

Next I used colors to show where Mom and I shared a match, where Dad and I shared a match, and where all 3 of us shared a match. In those cases, I added the length of our longest segment of shared DNA with the match in cMs. (If you use AncestryDNA, click your match's number of shared cMs to see what is the longest length.)

I found 10 matches that only Dad has, and 7 matches that only Mom has. All 17 had a strong number of shared cMs. It's possible I share an amount of DNA with them that's too small to make my list. There were no matches in my column that didn't match either Mom or Dad. That qualifies them as true matches and not false positives.

Are Your Matches Really in Your Family Tree?

Kelli Bergheimer speaks about IBD (Identical By Descent) vs. IBS (Identical By State) matches. IBS is also called IBC (Identical By Chance). An IBD match is definitely family—a true cousin. This is someone who fits in your family tree. An IBS/IBC match may or may not be a true cousin. They may share DNA with you because their ancestors' roots are planted so close to yours. And that's one way this spreadsheet helps you understand your matches.

If my parent(s) and I share a match with a good number of cMs, I can be confident that person is a true cousin. I did a bit of research on this concept, and the following numbers vary a bit from place to place. But here's the basic idea.

If the *longest segment* you share with a DNA match is:

• 12 cM or more, you're almost surely true cousins
• about 10 to 12 cM, there's a 90% chance you're true cousins
• between 8 and 10 cM, there's a 50-50 chance you're true cousins
• between 6 and 8 cM, there's less than a 50% chance you're true cousins
• smaller than 6 cM, there's about a 10% chance you're true cousins

Even if you are true cousins, your most recent common ancestor (MRCA) may be too far up your tree to identify. Your odds of finding that MRCA get better and better when you and your match share a segment of 30 cMs or more. If you share a segment of about 16 to 30 cMs, you've got about a 50% chance of finding that MRCA. Any lower and the odds are slim to none. (My parents' longest segment is 14 cMs.)

The message is clear. Don't beat yourself up if you can't identify a match who shares a longest segment of less than 16 cMs with you.

Practical Ways to Use This Spreadsheet

I love this spreadsheet because it can tell me which of my 4 grandparents' lines connect me to a DNA match. I added a column next to the matches' names showing which grandparent(s) is the connection:

• Adamo for Mom's paternal matches
• Mary for Mom's maternal matches
• Pietro for Dad's paternal matches
• Lucy for Dad's maternal matches
• various combinations to cover double matches and unassigned matches

Use your parents' AncestryDNA SideView™ to assign a match to one or more grandparents' branches of the family tree.

This creates a sort of cluster when you sort your spreadsheet by the grandparent column. In my case, if Grandma Mary is their only connection to me, and they aren't a very strong match, I may not find our MRCA. (Again, that's because Mary's line dead ends too early.) If Grandpa Adamo is their only connection, I know they have roots in his hometown of Baselice, Italy. And sometimes a match's last name reassures me that my spreadsheet is correct.

What About Your Closest Tested Relatives?

Getting back to my parents matching each other—I went to DNA Painter to use the Shared cM Project 4.0 tool. I entered the total number of cMs my parents share: 37. The tool says that pedigree collapse or endogamy can affect the results. There's a good chance I have one or both of those things in my family tree. All my ancestors came from a small string of neighboring Italian towns.

Putting pedigree collapse or endogamy aside, my parents have:

• a 50% chance of being 5th, 6th, or 7th cousins, along with several other relationships in that range
• a 19% chance of being half 3rd cousins or 3rd cousins once removed
• an 18% chance of being 4th cousins or half 3rd cousins once removed
• a 10% chance of being half 2nd cousins or 2nd cousins once removed

Based on my extensive family tree, I'm confident my parents are 5th, 6th, or 7th cousins. All I can do hope that their towns' church records go public some day so I can dig into the early 1700s.

If you have very close relatives who've DNA tested, try this type of DNA analysis for yourself. I'm excited to be able to figure out my lower matches who have a stronger connection to one of my parents than to me.

And speaking of DNA matches:

• How to Crunch Your DNA Numbers
• Why Care About Your DNA Matches?
• How to Use the Power of Shared DNA Matches

How DNA Can Help Find Your Ancestral Hometown

Some people think seeing your DNA pie chart is a waste of time and money. When I saw my first DNA results in 2012, I'll admit, I was very disappointed. But in 10 years, the number of DNA testers and the technology used for analysis have grown.

AncestryDNA updated their DNA Communities recently. I checked the results for my parents, my husband, and me. My first thought was, "Yeah, you got that right." The communities matched exactly what I know based on the paper trail.

It's amazing to see how specific our results are as compared to 10 years ago.

Mom and I have the South Benevento & North Avellino Provinces community. That's exactly how I always describe where our ancestors came from. When I zoom into our communities on AncestryDNA, the locations of my direct ancestors begin to pop up. They form a corridor that stretches from northern Avellino up through southern Benevento. That's the cradle of my genetic matter right there.

The updated AncestryDNA communities are too accurate to ignore.

This is all very nice to see. Only later did the true value of these communities hit me. What if you don't know exactly where your people came from? What if family lore tells you nothing more than a country of origin? I know that's true for so many descendants of immigrants. What if that country's borders have changed over time? How can you get anywhere in your family tree research on such slim information?

One answer is your DNA Communities. AncestryDNA compares your DNA results to those of millions of other test-takers. They form clusters of people based on your matches and your matches' matches. If your DNA matches have identified their ancestral hometowns, or if they match the population there today, it becomes clear. Your people must have come from the same area.

My husband's updated community is also very accurate. His test results have always said nothing more than 100% Japanese. That's awesome in itself, to be 100% of anything.

But his new community has the names of 5 cities, and the first 2 happen to be exactly where his family came from. His dad's side is from Hiroshima, and his mom's side is from Yamaguchi. I can verify this with his ancestors' immigration records. It's amazing that all his history, from 300 years ago to his grandparents, rests in a small slice of Japan.

And my family history is very similar. Civil records put my ancestors in that thin corridor of southern Italy since the late 1600s. Church records show my maiden name existed in my Grandpa's hometown since at least the 1400s.

Let Your Communities Narrow Your Search

Let's say your ancestor emigrated too early for their hometown to appear on a ship manifest. And you can't find any other record for them that states a specific town of birth. Check your DNA Communities! One of them may narrow down your search to a handful of towns.

In many countries, you must know your ancestor's town of birth or you may never find their records. If you can narrow down your search to a short list of towns, you may find your ancestor faster.

If I didn't already know my ancestral hometowns, these results would have pointed the way.

I checked my DNA results on MyHeritage, and they have what they call Genetic Groups. I have far less confidence in these groups. They're not very specific, and they include Ohio because my dad and his cousins were born there. His family had only recently moved there. My Ohio roots are very shallow.

My 2 other Genetic Groups are better than Ohio, but nowhere near as specific as AncestryDNA. They are Italy (Bari) and Italy (Campania). I know my roots are 100% in Campania, but that's an entire region of the country. That wouldn't help me find my ancestors. MyHeritage has a "Low" confidence level that I'm even from Campania!

My 23 and Me results are way off in so many ways. What they tell me would be of no use whatsoever in helping me find my ancestors. But I didn't buy their test kit. I don't know if the results would be more specific if I had.

Have you tested with AncestryDNA? Do you still have some mysteries about your places of origin? Check out your updated communities! You can even see which of your DNA matches belong in the same communities. If you haven't found your town of origin, maybe one of your closest matches has.

Why DNA Matches Appear Closer Than They Are

DNA match Maria and I are 6th cousins twice removed. I've done the research work, as has she. My 7th great grandparents Domenico and Filippa are her 5th great grandparents. Our relationship is through my paternal grandfather's branch. According to Blaine Bettinger's Shared cM Project, she and I should share 0–45 cMs because we're so distant. But we don't. We share 79 cMs (centiMorgans). That's enough for us to be solid 3rd cousins.

A chart on the ISOGG Wiki says there's an 11% chance that 6th cousins testing with AncestryDNA^® will share any DNA. And this is my 6th cousin twice removed!

Exclude Smaller Amounts of DNA

So why do some DNA matches appear to be much closer cousins than they are? The answer in this case is endogamy. Endogamy is a long history of marrying within a closed community. And it ran rampant among my ancestors. My roots run deep in a handful of neighboring hills towns in the Campania region of Italy. Populations stayed put for centuries. Everyone married someone from town or someone from the next town.

Keep in mind your 3rd–4th cousin DNA matches may be more distant than they appear.

All that swimming in the same gene pool makes for some complex relationships. But what if DNA match Maria and I have another, more distant relationship? If we do, then our shared 79 cMs may be the sum total of smaller, unrelated amounts. We may be getting up to 45 cMs from Domenico and Filippa and 34 more cMs from other shared ancestors.

If your DNA testing service has a chromosome browser (FamilyTreeDNA or 23andMe^®), use it to focus on the longer stretches of DNA you share with a match. If you exclude the very short spans, you're left with a more realistic amount of meaningful shared DNA. That smaller number may point to your true relationship.

Find Another DNA Source

For reasons I can't understand, AncestryDNA doesn't offer a chromosome browser. That means I can't focus on only the long stretches of DNA Maria and I share. Luckily, I've found our main relationship. To account for the extra DNA, I need to expand the common branches of our family trees. I need to look for other relationships.

I found a possibility, but it requires one logical assumption. Maria's great grandfather Giuseppe Basilone was born in about 1852. There are only two Giuseppe Basilones born in the town at that time. (Find out how I know there are only two.) There are no available marriage or death records to prove my theory. But there is logic.

I took the bold step of merging two people in my family tree:

• 1852 Giuseppe Basilone of unknown ancestry, and
• 1851 Giuseppe Onofrio Basilone, who happens to be my 2nd cousin 4 times removed.

When documents are not available, thorough research around your person can help.

Why was I comfortable doing this? Because:

• Giuseppe Onofrio was 32 years older than his wife when he married in 1904. (I have the 1904 date from his wife's birth record.)
• The Giuseppe I'm trying to connect to had 4 children from 1878–1886, and then they stopped coming.
• It's logical that Giuseppe's first wife died after 1886, and he remarried a much younger woman.
• The only other possible match is a Giuseppantonio (not Giuseppe) Basilone. He's a dead end. There's no annotation about his marriage, and there are no birth records for his children.

Still, this is a theory, so I wrote a detailed note about it in my family tree. If I'm correct, DNA match Maria is now also my 5th cousin once removed. This relationship is through my paternal grandmother. My 5th great grandparents Paolo and Giuseppa are her 4th great grandparents. We just got closer! That relationship is good for about 21 cMs, or a range of 0–80 cMs. This extra relationship would explain why Maria and I share 79 cMs but are distant cousins.

Two distant relationships added together can seem like a much closer cousin.

Don't Get Hung Up on Estimates

What does this mean to you when you're checking out your DNA matches? Once you get past 2nd or 3rd cousins, every other match may be more distant than they appear. This is especially true if you come from an endogamous population like me. Other well-known endogamous populations are:

• Acadians
• Amish
• Arabs
• Ashkenazi Jews
• French Canadians
• Mennonites
• Newfoundlanders
• Polynesians

Think of the early settlers of Colonial America. Their community was pretty small, so how many marital choices did one have? This was the case with all my semi-isolated Italian towns.

Don't fret about the estimated cousin relationship if the facts don't support it. Instead, look for other, hidden relationships.

How to Crunch Your DNA Numbers

I watched an excellent online course about data visualization. (Nerd!) In a nutshell, the presenter explained the pros and cons of different types of charts. Which one are easier to understand? Which answer your questions?

Naturally, I spent the whole time thinking how to use these ideas for genealogy.

My first thought was DNA results. Ethnically, my parents and I are all Italian. Their ancestors all came from a very small area of Italy. I've traced all their lines back to the late 1600s, and no one moved. Not until 1899 did we start to become American.

Our 3 DNA test results have changed over time as the database grew and algorithms improved. I would like to see how each of my parents influence my DNA, and how we all compare to one another.

An Excel spreadsheet is a very simple way to generate all kinds of charts. First I entered some basic information.

• Mom, Dad, and I are the 3 rows in the spreadsheet.
• We each have 3 DNA ethnicities, so these are the 3 columns in the spreadsheet:
  • Southern Italy
  • Greece & Albania
  • Northern Italy

For each of us, I entered our percentage of each of the 3 ethnicities.

These 4 charts show the same information. But which one best answers the question at hand?

To create a chart based on data, select all the data in your table, including the names of the rows (Mom, Dad, Me) and columns. (Click your mouse in the top left cell, A1, and drag your mouse to the bottom right cell.)

With the data selected, go to Excel's Insert menu. In the Charts section of the tool ribbon, click in the lower right corner to See All Charts. On the new window that opens, click the All Charts tab. Now you can click through lots of options to see a preview using your actual data.

When you select a type of chart, it will appear on your spreadsheet. You can click and drag that chart anywhere on the page. Once you click a chart, you can click the paintbrush icon to change the style of colors. And you can give it whatever title you choose.

Based on the online course I watched, I chose 4 types of charts with different qualities. Each one shows how my DNA compares with that of my parents.

1. In the Custom Combination chart (top left in the image above), my parents (green and blue bars) have similar DNA. The yellow line (representing me) shows that I have:

• a touch more Southern Italian DNA than either of my parents
• a good deal more Greek/Albanian DNA than either of my parents
• a good deal less Northern Italian DNA than either of my parents

This is a good chart because it clearly shows what I wanted to know: how do I compare to Mom and Dad?

2. The 100% Stacked Column chart (top right in the image above), we see a different visualization. But there's bit less clarity. You can't see from this chart that I have more Southern Italian DNA than my parents. But you can see that I have a lot more Greece/Albania, and a ton less Northern Italy.

3. The Scatter Chart with Straight Lines and Markers (lower left in the image above), is clearer than chart 2. You can see that I have:

• the most Southern Italy, but not by much
• the most Greece/Albania, by a decent amount
• the least Northern Italy, by a lot

Strangely, the ethnicities don't appear on this chart.

4. The Clustered Bar chart (lower right in the image above) . This is a better comparison of the 3 of us than charts 2 or 3. Why?

• You can see how we "stack up" to one another in each of the 3 ethnicities.
• The percentages are pretty easy to see.

Chart 1, the Custom Combination chart, is the best choice to answer my initial question. When I first created this chart, the bars were me and mom, and the line was dad. Then I realized that when you're choosing the type of chart to create, you can set who gets the line and who gets the bars.

Before I created these charts, I had to keep switching DNA results on Ancestry to get an idea how we 3 compared. It was a revelation to me that I wound up with more Southern Italy and Greek/Albanian DNA than my parents.

You can easily compare your DNA to that of one or many DNA matches. Which questions do you want to answer?

If you don't manage multiple DNA tests, don't worry. You can create charts comparing yourself to as many of your Ancestry DNA matches as you want. When I view my 1st cousin as my DNA match, I can click Ethnicity to see his percentages. How interesting! He has a lot more Northern Italy than I do, but he has no Greek/Albanian at all.

Imagine charting a group of your DNA matches' ethnicity percentages in a spreadsheet. What might you learn from charting the data? What do you want to learn?

And speaking of DNA:

• Your DNA Matches Hold Hidden Clues
• Attracting a New DNA Match
• Untangling Our Twisted Family Relationships

Your DNA Matches Hold Hidden Clues

"How can DNA help me build my family tree?" I see this question online all the time. People who haven't taken a DNA test are wondering if it's worth the price.

I can see their point, can't you? If they care about only their own ancestry, they may not care about finding their 5th cousin 3 times removed.

Here's why DNA matches are important to any genealogy researcher: The facts you discover in their trees can fill in the blanks in your tree.

For example, I was looking at a DNA match in the 4th–6th cousin range. He has Irish Ancestry on his father's side, and Italian ancestry on his mother's side. His Italian grandparents, with familiar last names, were all I needed to begin my search.

His info was a little vague. But I found his grandmother's birth record in the vital records from my Grandpa's hometown. I love it when the Italian birth records include a note about who this baby grew up to marry. But this person, Liberantonia deMatteis, had no such note.

Your DNA test buys you access to an endless amount of clues for your family tree.

Searching for his grandfather, I found 2 possibilities in the Italian records. Without that marriage notation, I couldn't be sure which was the right person.

I turned to Ancestry.com, hoping to find the couple's immigration record for more clues. Instead, I found a more detailed family tree owned by a relative of my DNA match (same Irish last name). Her family tree confirmed that I had found the right grandmother for my DNA match. And it pointed out a crucial error in the first tree. His name wasn't Pasquale, it was Innocenzo. With that clue, I found the birth record for my DNA match's grandfather.

I already know more about my DNA match's Italian ancestry than he does.

Without this DNA match to Innocenzo and Liberantonia, I would have passed them by. Knowing there's a connection, I must climb each of their trees to find our relationship.

I've put in the work to make finding ancestors easy as can be.

It took me about 3 hours to find a true relationship to my DNA match, but it was fun. His grandmother is my 5th cousin twice removed, so my DNA match is my 7th cousin.

His grandmother's mother was the key to our multi-faceted relationship. I climbed her father's side of the family 5 generations to reach my 6th great grandparents Saverio and Angela. But I also climbed her mother's side of the family 5 generations to reach my double 6th great grandparents Giuseppe and Maria.

Does that make us triple 7th cousins? We do have a 4th–6th cousin DNA relationship.

Not all DNA test-takers are actively building their family trees. That's why they don't answer us when we write to them. Rather than write to this DNA match, I will update my public family tree with his relatives.

Some day, if he's interested, he'll stumble upon my tree and be amazed at all the generations I've found for him. In the meantime, this helps me in my quest to connect everyone with roots in my ancestral hometowns.

If you're one of the DNA skeptics, know that your matches can give you helpful clues, whether they know it or not.

RootsTech's DNA Lectures Keep Inspiring

Last week's virtual RootsTech conference can keep inspiring and teaching us all year. My main focus so far is the DNA lectures. Instead of watching them all one after another, I kept pausing to try out the techniques I was learning.

First I learned about chromosome browsers. I wish Ancestry.com would add one because I have the most cousin matches on that site. I learned how to triangulate matches with the chromosome browser on MyHeritage.com. I uploaded my DNA as well as my parents' DNA there long ago.

This lecture made me think of a long-standing mystery in my own DNA. A tool on GEDmatch told me my parents are related. They show up as each other's matches on Ancestry. The first thing I wanted to try on MyHeritage was a comparison of the 3 of us.

Once I logged into myheritage.com, I went to the DNA menu and chose DNA Tools, then Chromosome Browser. You can compare up to 7 DNA matches at a time to see exactly where you intersect.

But before I tried this, I had watched a lecture about pedigree collapse and endogamy. My remote ancestral Italian hometowns had tons of intermarrying of the families. In fact, even though they met and married in Ohio, my paternal grandparents were 3rd cousins.

When I was a kid, I thought it was a coincidence that Grandpa had the same last name as Grandma. No one said anything to me, but there's no way Grandpa Iamarino didn't know who his landlord was in 1927. He was Pasquale Iamarino—the 2nd cousin of Grandpa's father. Pasquale left Italy when Grandpa was a little boy, but they definitely knew they were family.

Because my grandparents were 3rd cousins, I have double ancestors belonging to both of them. That's the pedigree collapse.

This lecturer spoke about endogamy, when families intermarry for generations. Another lecturer explained that ethnic groups share certain DNA markers. That's how they determine your ethnic estimate. I had an "aha" moment, thinking this must be why Mom and Dad share some DNA. His people and her people came from neighboring Italian towns.

I thought the chromosome browser might show that my parents' relationship is only by place.

I used a chromosome browser to see exactly where Mom and Dad are related to each other.

On MyHeritage, I compared myself to both Mom and Dad. I found 2 chromosomes where they matched me and one another! They call this triangulation. You can see it on the chromosome browser if you compare only 2 of your DNA matches at a time. It means my parents match one another as well as me.

I wondered if any of my other matches had an intersection in the same spots. I compared several matches on the chromosome browser with no luck.

Then I saw a match whose name I recognized. She's a woman from Grandpa's hometown in Italy, and her son and his daughter are all DNA matches to both my parents. I found that all 3 of them matched at the same exact location as my parents on my chromosome 6.

Through my research I found out the man in the group is my fifth cousin. (His daughter is my 5th cousin once removed.) But the relationship is on his father's side. Think about that. His mother matches us all in the same spot, but he's my cousin through his father and my father.

I wondered if either of my parents triangulated with any of these three people. I compared each of my parents to each of the three, one pair at a time. Here's what I found:

• The matriarch of the family triangulates with Dad only.
• Her son (my 5th cousin) triangulates with both Mom AND Dad!
• Her granddaughter triangulates with Dad only.

It's all a bit infuriating! I've gone very far on each of my parents' family trees. Their 37 shared centimorgans of DNA point to several possible relationships. I can rule out many because I know they do not share the common ancestor needed for these relationships.

How can this family be so intertwined with mine when the best we are is 5th cousins?

All I can do is keep on fitting people from my ancestral hometowns into my family tree. Remember: You've got to document your ancestor's multiple marriages. The children from the second marriage could be your missing DNA link.

I'm also going to return to the RootsTech lectures and soak up as much information as I can about DNA. The quest continues.