Origin of PF1975/E1b-Z830-2nd

[John Doe]

Have been confirmed by FTDNA as E-Z827, ordered the E-Z827 downstream pack, in the meanwhile have been told I may belong to a branch of PF1975. I have been wondering, if its source/origin is known and its frequency among populations also known?

[Passa]

Typically found among Ashkenazi Jews. Not much is known at the moment. http://www.haplozone.net/e3b/project/cluster/3/map