If you’ve been researching your family history for any length of time, you’ve probably accumulated a pretty impressive collection of information. Names, dates, places, marriages, children, sources, and maybe even a few family mysteries. All of that information is stored in your family tree software, but how often do you really look at the big picture?
Most of us research one person or family at a time. We follow a particular branch, investigate a mystery, or search for a missing ancestor. But what if we could examine our entire family tree at once, looking for patterns, inconsistencies, and opportunities for further research?
If you’ve ever looked inside a downloaded GEDCOM file, you’ll probably notice it looks like a long list of random text. But AI understands the format and the information, and can turn it into something you can use.
First, What’s a GEDCOM File?
GEDCOM stands for Genealogical Data Communication. It’s a standardized file format designed to allow family tree information to be transferred between different genealogy programs and websites.
Think of it as a portable version of your family tree. It contains information about individuals, families, relationships, events, and sometimes sources and notes. Unlike the colorful family trees we’re accustomed to seeing on our screens, a GEDCOM file is actually a text file containing structured information. And here’s the interesting part: because it’s text, AI programs such as ChatGPT, Claude, and Gemini can potentially read and analyze it.
You don’t need to understand the technical structure of a GEDCOM file to take advantage of this. You just need to know how to download one and what questions to ask.
Getting Started
First, consider the privacy implications. Your GEDCOM may contain information about living relatives, including birth dates and family relationships. Check the AI service’s privacy and data-use settings, and consider creating a separate tree containing only deceased individuals.
Second, export the GEDCOM file for your selected family tree from your genealogy program or website. Most major genealogy applications offer this feature, although the exact steps vary. Save the file somewhere you can easily find it. (Bonus – this also lets you have a backup in case of a computer issue!)
Next, open your preferred AI program and attach the file to a new conversation. Look for a paperclip, plus sign, or attachment button near the area where you type your questions. It’s very much like attaching a file to an email.
Once you’ve attached your file, you’re ready to start exploring. Here are five prompts to get you started.
1. Get to Know Your Family Tree
tart with a general overview. You might be surprised by how much information you’ve collected over the years.
Try this prompt:
Analyze the attached GEDCOM file and give me a summary of my family tree. Tell me how many individuals and families it contains, the earliest and latest dates recorded, and the most common surnames. Present the results in a simple table.
This can give you a snapshot of your research and help you understand the scope of your collection.
2. Discover Geographic Patterns
Our ancestors moved, sometimes across town and sometimes across oceans. Examining locations throughout your tree may reveal migration patterns you hadn’t noticed.
Try this prompt:
Examine the birth, marriage, and death locations in my GEDCOM file. Identify the five most frequently mentioned places and how many events occurred in each. Are there any patterns suggesting that families moved from one location to another? Explain your findings in everyday language.
You might discover that several family branches lived in the same region during a particular period, suggesting opportunities for further investigation.
3. Find Missing Information
We all have gaps in our family trees. Sometimes they’re obvious, like a missing birth date. Other times, they’re buried among hundreds of individuals.
Try this prompt:
Review my GEDCOM file and identify individuals who are missing birth dates, death dates, or birthplaces. Create a table with their names, the missing information, and any relevant details that might help me research them. Prioritize individuals who already have other useful information recorded.
Instead of randomly choosing your next research project, you’ll have a list of promising opportunities.
4. Look for Possible Errors
Have you ever discovered that an ancestor supposedly had a child at age 75? Or that a marriage occurred several years after one spouse died? These inconsistencies can creep into even carefully maintained family trees.
Try this prompt:
Examine the individuals and relationships in my GEDCOM file for possible errors or inconsistencies. Look for unusual ages at marriage, children born after a parent’s death, impossible dates, and possible duplicate individuals. List anything suspicious and explain why it deserves further investigation. Do not automatically assume these are errors.
Remember, an unusual date isn’t necessarily incorrect. It’s simply something worth checking.
5. Create a Research Plan
This may be my favorite one. Instead of just identifying problems, AI can help you decide what direction to head in next.
Try this prompt:
Act as an experienced genealogist. Based on the information in my GEDCOM file, suggest five specific research questions that could help me expand or improve my family tree. For each question, explain why it’s worth investigating, what information I already have, and which types of historical records might help me find an answer. Do not invent missing facts.
You now have the beginnings of a research plan based on information already in your tree.
A Few Words of Caution
AI is a great assistant, but it isn’t a substitute for careful genealogical research. AI programs can misunderstand relationships, overlook information, miscount records, or invent details (called hallucinations). Additionally, very large GEDCOM files may also exceed what a particular AI program can process reliably. Ask the program whether it was able to examine the entire file, and verify important findings against your original tree and source documents.
Most importantly, never assume that an AI-generated conclusion is a proven genealogical fact. As someone said in a talk I gave recently “Trust but verify.”
Your Next Research Adventure
Your GEDCOM file is more than a way to transfer information between genealogy programs. It’s a collection of clues about your family’s history, and AI offers a new way to explore those clues. And you don’t need advanced technical skills or complicated software to get started. Export your GEDCOM, upload it to an AI program, and try one of these prompts. You may discover that your next great genealogy breakthrough has been hiding in your own family tree all along.