How to Build a Professional-Quality Family Tree

I began writing this blog to encourage other genealogy hobbyists to take their family trees to a new level. My first several articles focus on the basics of a reliable, valuable family tree:

1. Gather multiple pieces of evidence for each fact. People make mistakes. It could be the census taker or the person providing information for someone's death certificate. Because of human error, one piece of evidence does not make proof.
2. Cite your sources. It's critical to be able to retrace your research steps. If you cite your source for a fact as the 1930 U.S. Federal Census, give the location right down to the sheet number, and provide a link to where you found it online, it's reproducible. If it's reproducible, it's more reliable.
3. Analyze your facts for discrepancies. My family tree has many people with the exact same name. I found a situation where I gave the same birth date to two different men with the same name. I needed more investigation to fix the error.
4. Ensure you're recording facts for the right person or people. For example, are you sure the census form you're looking at is for the specific family you think it is?
5. Research historical events as they pertain to your ancestor. One of my ancestor's hometown changed its name after World War II. If I hadn't discovered that, I wouldn't have been able to visit the town years ago. And I wouldn't be able to find the town's vital records today.

It all boils down to this: You've got to do the legwork. Do not trust information that falls into your lap. Use someone else's tree, for example, as a series of leads for you to investigate.

The New York City Municipal Archives at 31 Chambers Street in downtown Manhattan. It's the Taj Mahal of research for New York City families.

How Professional Genealogists Work

Professional genealogists follow a standard of proof to deliver accurate research to their customers. Maybe you've seen references to the Genealogical Proof Standard.

Let's look at how the five elements of this standard can improve your family tree research.

1. Conduct a reasonably exhaustive research. This goes back to my first point above of gathering multiple pieces of evidence. It also involves conducting searches that may not yield any results. For example, let's say you expected to find a family at a particular address in the 1930 census, but they're not there. To be thorough, you may need to go through every page in that census. If you still haven't found them, you may need to check out the surrounding enumeration districts.
2. Maintain complete, accurate citations to the source or sources of each piece of information. This was my second point above. You want to make your steps retraceable and show the quality of the sources. For example, the 1930 U.S. Census seems more reliable than "my cousin's father". Citing your sources can also show how many sources you've used. Several excellent sources make a fact very reliable.
3. Test your information. This relates to my third point above about analyzing your family tree for discrepancies. If you find an error, you may need to test the validity of one of your sources.
4. Resolution of conflicts among evidence items. This would be the logical conclusion to your analysis of discrepancies. When you resolve a discrepancy, make a note about the steps you took, and why you made your decision.
5. A soundly reasoned, coherently written conclusion. When you resolve a discrepancy or find something in your tree that you don't have a lot of confidence in, make notes. I like to flag questionable facts in my family tree by adding a bookmark (a feature in Family Tree Maker) and a note. This alerts me to facts with a lower level of confidence so I can treat them with the proper amount of faith.

You may not have the funds to hire a professional genealogist. You may prefer to do the work yourself because the hunt is what makes it so enjoyable.

But if you can adopt these practices, you can have a professional-quality family tree.

And speaking of genealogy methods:

• Let a Few Quick Wins Reinvigorate Your Genealogy Research
• How to Visualize Your Ancestor-Finding Progress
• Find Those Stubborn Genealogy Documents with Creative Searches

Here's Why Genealogists Love Immigrants

ID photo from a Petition for Naturalization

Last year my cousins' father passed away and I found his obituary. The man we called Doc is someone I've known since I was a little girl. But I didn't know anything about his family.

Genealogists know how to pull tons of facts from a well-written obituary. I documented Doc's family names and relationships in my family tree software.

Using these new pieces of information, I searched for his father Mario's arrival in the United States from Italy.

Mario's naturalization documents are among the richest I've found. Let's go through them to see how much you can learn about an immigrant ancestor through their naturalization papers.

Certificate of Arrival

When an immigrant wanted to become a citizen in the early 1900s, they provided information about their arrival into the U.S.:

Certificate of Arrival

• date of arrival
• port of entry
• name of ship

That's a boon to your family tree research right there. In Mario's case, the documents include a Certificate of Arrival that verifies these facts.

This certificate gives you, the family tree researcher, exactly the information you need to find Mario's ship manifest. There you can gather information that may include his father or mother's name and his town of origin.

Declaration of Intention

This form has so many vital facts packed into a small area. In Mario's case, we learn his:

• address
• occupation and age
• physical description
• town of birth
• birth date
• wife's name and date and place of birth
• wedding date
• children's names and birth dates

Mario's arrival information, confirmed on the Certificate of Arrival, is repeated here. Plus we see his signature and photograph.

Petition for Naturalization

Enough data to make a genealogist weep.

After filing a Declaration of Intention and going through the process, the immigrant completes another form. Mario's Petition for Naturalization repeats and supports the facts on his Declaration of Intention.

So if you are able to find one, but not both of these detailed forms for your ancestor, you've still found a genealogical treasure.

If your ancestor had a spouse and children at the time of their declaration and petition, you now have an official source of their vital information.

Mario's paperwork provided me with Doc's real name and birth date, as well as those of his brothers, whom I didn't know. With these facts I can fan out my search for census forms, Social Security Death Indexes, and other records of this family.

Perhaps most excitingly, I can search for documents from Mario's hometown in Italy and try to extend his family history there.

Naturalization records are available through the U.S. Naturalization and Records Administration (searchable online), Ancestry.com and FamilySearch.org.

The sheer density of critical vital information makes genealogists absolutely adore our immigrant ancestors.

And speaking of immigration:

• 6 Key Genealogy Facts on a Ship Manifest
• Why Did They Come To America?
• What To Do When Your Last Name Is So Common

Step-by-Step Discovery of My 5th Great Grandparents

It wasn't long ago that I discovered the maiden name of one of my great great grandmothers. (See This Expanded Resource Provided an Elusive Maiden Name.) It was a big deal when I learned her name was Maria Luigia. But it was amazing to learn her last name: Girardi.

My great great grandmother's birth record.

It was even more exciting to me as a Yankees fan! (For non-fans, the Yankees' manager was Joe Girardi for many years.)

Last night, while the Yankees were winning their game, I was at my computer. I was going through birth records from the online Italian archives. (See How to Use the Online Italian Genealogy Archives.) I was focusing on Maria Luigia Girardi's hometown of Pescolamazza—now called Pesco Sannita, Italy.

Her 1840 birth record gave me the names and ages of her parents: Gioacchino Girardi and Maria Teresa deNigris. I set Maria Teresa deNigris aside for the moment and worked to fill out this family more thoroughly.

First I looked for more siblings for Maria Luigia. I found Emidio born in 1843, Nicola Maria born in 1847, and Francesco Saverio born in 1851. Based on their parents' ages, there should be more children, both older and younger than Maria Luigia. But before finishing that search, I got excited to find her father Gioacchino's birth record.

My great great great grandfather's birth record.

There he was, my 3rd great grandfather, born in 1814. His parents, my 4th great grandparents, were Nicola Girardi and Maria Pennuccia. He was their first-born child, but I found several younger siblings by going year-by-year through the birth records for their town.

Sibling Giuseppe was born in 1815, Francesco Saverio was born in 1817, but apparently he died because another Francesco Saverio was born in 1822. Maria Rosa was born in 1825 and Pietrantonio in 1829.

Once I was confident I'd found their first-born child, I went in search of the marriage of my 4th great grandparents. The documents for marriages in 1813 in Pescolamazza are incomplete, consisting only of each couple's two declarations of their intention to marry.

Bingo! My fifth great grandparents—two sets!

But that was enough.

I found Nicola Girardi and Maria Pennuccia's declarations in February 1813. Each of these two documents contained the man and woman's parents' names.

There they were. Two sets of my 5th great grandparents from a branch I would never have discovered if I hadn't learned that previously unknown name of Girardi: Giuseppe Girardi and Serafina Orlando, and Carlo Pennuccia and Angela Verro.

During tonight's Yankees game, because I can't just sit on the couch all evening, I will search for more children born to these two couples. Their children will be my 4th great uncles and aunts. Having their names, and finding their children, will allow me to piece together a lot of the Girardi and Pennuccia documents from the town.

Finding the siblings is the only way to know how or if other people in this tiny town are related to me.

My experience in documenting the entire town of my grandfather taught me a lesson. (See Why I Recorded More Than 30,000 Documents.) If people have the same last name, and it's a very small town, and it's an era when relocating was not common, they're most probably related.

So go after those siblings. If you're searching records from the 1800s, remember that a woman might give birth nearly every year, and well into her forties. While many of the children will not live to adulthood, I personally treasure each one. And I'm so thankful to find them.

Back to the search!

You may also enjoy:

• Where Did Grandpa Come From?
• Where Did They Go Next?
• How Is That Possible?