Sunday, January 14, 2018

Ashkenazic Jewish Shared DNA Survey

Ashkenazic Jews and those with Ashkenazic ancestry often share significantly more DNA with one another than would be expected because of endogamy; Ashkenazim all descend from a small group of people whose descendants all married one another--so we're all cousins many times over.  I've looked at how endogamy manifests in my own family (here, for example), but there are many others who have tested pairs of known relatives who could contribute data to our understanding of how having Ashkenazic DNA impacts amounts of shared DNA.

[There will likely be follow-on surveys to gather similar data on Sephardic and other Jewish subgroups.]

I was inspired by Blaine Bettinger's Shared cM Project which looks at distributions of shared DNA between people with specific known relationships.  But Ashkenazim don't always fit into Blaine's bins because of endogamy.  Getting a better understanding of how having Ashkenazic DNA impacts shared DNA should help those who are trying to understand how close an unknown match actually may be.

So I need your help to let me know how much DNA your known relatives who have DNA tested share with one another.  The more sets of known relatives and information we have about the DNA that they share we know, the better we will be able to understand how endogamy impacts how much DNA Ashkenazim share with one another.

Sunday, January 7, 2018

Baruch Hersch Rutner's Vacillating Mother

Baruch Hersch Rutner was my great-great grandmother's brother.  Or maybe her half brother.  He doesn't seem to have known which it was himself!
Birth of Burich Hers Rutner, 1871