Re: Using DNA matches to find Jewish ancestors #dna


Hi Jesse,

Your dad's results definitely point to one fully Ashkenazi grandparent as the most likely possibility. When this is a surprise, usually it's a grandfather. The most likely scenario is also that one of your father's known grandfathers was not his biological grandfather; this is referred to as an MPE (misattributed parentage event). I personally would not trust MorleyDNA because I've heard haplogroups aren't always correct. If possible, I would have your dad do the following:
  • Test at AncestryDNA because they have the largest database. Determine whether you can find matches to all 4 of your father's grandparents.
  • Have you father test at 23andme. They will give you a basic paternal haplogroup, and if the Ashkenazi Jewish grandparent is his maternal grandfather, he very likely will have Ashkenazi painted on his X chromosome. 
  • You may also want to have known relatives test if your results don't yield any conclusive answers.

I say all of this as a professional genetic genealogist who specializes in Jewish DNA cases such as these. I'm also the moderator of the Jewish genetic genealogy group on Facebook.

If you have any questions, please let me know. 

Take care,
Adina Newman
Sharon, MA

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