Recently, I’ve been assisting several clients with their DNA matches from the DNA tests they’ve taken. As I wrote here, Ethnicity estimates shouldn’t define your family tree. Since I have either built or helped expand their family trees, we’ve had success connecting many of those matches to their trees. However, it’s frustrating for both my clients and me to encounter the large number of matches that either have no tree linked to their DNA test or only a small tree with just two or three people. This lack of information is not helpful for anyone involved. While some may be primarily interested in ethnicity reports, even they are missing out on the full story. Let me explain.
Why Link Your DNA Results to a Family Tree?
Using Ancestry.com as an example, linking your DNA results to a family tree is essential because it allows you to identify how you are related to your DNA matches. By comparing your genetic information to individuals in your family tree, you can gain valuable insights into your ancestry and discover new family connections through shared ancestors. Essentially, it bridges the gap between your genetic data and your known family history.
When you link your DNA results to a public tree on Ancestry.com, you activate shared ancestor hints, which appear in the ThruLines tool. The larger your linked tree, the better your chances of finding common ancestors. This connection allows you to:
- Identify who in your tree is a DNA match.
- See how you’re related to your matches.
- Keep a record of these connections.
- Determine which parts of your tree they can help with and which shared relatives they might have stories or information about.
Link Your DNA Results
At Ancestry, you need to link your test to “you” in a tree. If the DNA test belongs to your mother, link it to your mother in your tree. Note that your test can only be linked to one person in one tree at a time. If you decide to disconnect and reconnect to another tree, record everything first, as you will lose your current ThruLines. These will regenerate based on the new tree but may differ depending on the tree’s content and other factors.
To receive green document leaf hints, potential parent hints, and DNA hints such as ThruLines, you need to provide enough information for Ancestry’s system to connect the dots. This includes:
- Birth and death dates
- Birth and death locations
- All spouses, not just the one you descend from
- Children and their spouses
- At least one additional generation of descendants
Every generation added gives Ancestry’s software more “info” to use for connecting the dots.
Best Practices for Hints and Trees
Never blindly accept hints or assume their accuracy. Early in my genealogy journey, I trusted information without verification, believing that older generations had everything correct. Today, we have more resources to validate information and acknowledge that errors can occur. In your family tree, the leaves represent document or record hints, not DNA matches. The leaves on your DNA match page indicate a common ancestor identified in the tree of your DNA match.
When reviewing a hint, use the “maybe” button to move it into an Undecided folder if you’re unsure. I try to keep my leaves organized so I can easily identify new hints. While I ignore Ancestry Member Trees as sources (because they are not a source!) in my tree, I use them as research starting points and messaging opportunities.
I also ignore DNA icon picture hints, as these images often represent personal identifiers rather than actual ancestor photos. And they make for useless hints you do receive. I also do not use them in my own trees for that very reason. Instead, use Ancestry’s MyTreeTags to organize your tree. Tags help label people as DNA matches, military veterans, direct ancestors, and more. Tags can be universal (e.g., “DNA” or “Common DNA Ancestor”) or custom (e.g., for unique family history needs).
Understanding ThruLines
ThruLines are calculated for a maximum of seven generations, counting your parents as generation one. (“seven generations” is equivalent to the “5th generation” when counting back through your ancestry.) The three requirements for ThruLines are:
- You must have a tree.
- Your DNA test must be linked to a person in that tree.
- You must have DNA matches to other people with the same ancestor in their tree.
To maximize ThruLines, enter names of spouses and children for eligible generations. Feeding the machine with more data improves results.
Why Sharing Matters
I totally get why some folks might hold back from sharing their family trees; it can feel like you’re “giving away” a piece of your puzzle. But I like to think of it differently! Imagine if my efforts help someone stumble upon a long-lost ancestor’s photo or finally break down that stubborn brick wall in their research. Or what if I inspire someone to dive into Y-DNA or mitochondrial DNA testing? That’s what it’s all about! Collaboration in genetic genealogy can lead to amazing discoveries. Let’s come together and unlock these family stories—who knows what we might find!
Closing Thoughts
Genetic genealogy thrives on collaboration. By linking DNA results to detailed family trees and embracing tools like ThruLines and MyTreeTags, you can unlock powerful insights and connections. Sharing your research and findings enriches not only your own journey but also the broader genealogical community.
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