The I1-Z140 is a group that appeared in Europe when the pastoralists that went to Europe near 5000 ybp. No branch is known in the period 14000-5000ybp. It is very likely that the ancestor changed to the jewish religion in one of the Ashkenazi countries in Europe. It is extremely unlikely that the ancestor lived outside Europe when the ancestor became Jewish.
Since I1 is strongly present in North-Western Europe, it is clear that becoming Jewish without a Jewish father is highly exceptional in North-Western Europe.
Branch # | Y-DNA SNP | # of persons | CE of ancestor (95%) | CE range yfull.com (95%) | Group | A | S | M | G | I | R | J | B | C | |
AB-086 | I1-Z140-Y12663 | 4 | 758-1533 | 1100-1825 | I1 | A |
List of SNPs in yfull tree:Home - A0-T - A1 - A1b - BT - CT - CF - F - GHIJK - HIJK - IJK - IJ - I - I1