The Z2103 is a large haplogroup that originated about 6000 ybp in the North of the Middle East. See e.g. page on Eupedia It is no surprise that many Jewish branches originated in this area.
Most of the branches have a shared ancestor before the start of Judaism. In this group are both Ashkenazi, Sephardic and Mizrahi branches.
A view on the present old branches of R1b-M269 (outside the European branches) can be seen on NGS results of Atanas Kumbarov's Website. On his site you can see the Z2103 branches (Jewish and non-Jewish).
|Branch #||Y-DNA SNP||# of |
|CE of ancestor||most likely|
|R1b-Z2103-FGC14600||7||ME - Ib||-||A||I|