Sunday, October 11, 2026

Check Your Sides: Why Ancestry ThruLines Need Verification

I've mentioned this before to several of my genealogy friends but wanted to blog about it to remind folks that ThruLines are HINTS.  Hints are suggestions which you can verify or prove wrong....or even totally ignore-- that's your choice.



This ThruLines match of mine (shown above in split screen of ThruLines beside Profile page) is a great example. This is not an error by Ancestry. In the pop-out panel of the ThruLines, it shows the match as paternal because if the ThruLines is correct, the match would be through a paternal line. However, the profile page shows that the match is on the side that I (or Ancestry) has determined to be the maternal side. My mom has tested and the match shows she matches them for the same amount. In situations such as these, keep in mind that you could still be kin to a match through that path and share no DNA. Still you would have to verify that connection.

I wish Ancestry would do a comparison of the two sides in their code and kick out any ThruLines where the ThruLines hint couldn't possibly be true. I don't guess that will happen. Of course, this would not help with the ThruLines where the side of connection is correct but the path isn't. Pay attention and verify always, especially if you are going to be basing any further research or theories on the connection.

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