In this series: I am tracing my Irish roots and trying to pinpoint what part of the Emerald Isle my ancestors hailed from. Learn more here.
Where I left off: In my last post I talked about a new DNA match, “MJ”. MJ had a family tree that went back to Bartholomew of Bayonne, the person who I suspect may be my 3x great-grandfather. I was able to independently verify her tree and show how this DNA match was related to Bartholomew.
I also talked about the possible relationships between myself, my dad, and MJ based solely on the amount of DNA we share. But just because we all share DNA and have someone in our tree named Bartholomew McDermott, doesn’t mean it’s the same Bartholomew.
Now I need to do additional analysis of the shared DNA to not fall victim to confirmation bias.
In this post: I plan to do a deep dive into the shared DNA and develop new evidence to find our common ancestor. My first step will be to eliminate as many lines in my tree as possible, then create a targeted testing plan to determine if we both descend from Bartholomew of Bayonne.