Around 2,600 years before present (YBP), the paternal lineage of J-Y178104 took shape as it diverged from the common ancestor J-Y178103 branch.
The most recent common ancestor (TMRCA) of this branch is estimated to have been born around 2,200 years before the present (YBP).
See it on 
YTree
SNPs
Currently defining this branch
BY191593, ZS8912, Y178104/FT115921, FT118669, ZS8909, ZS8897, Z16636
Samples
Within our knowledge, J-Y178104 is the ancestor of 6 Somali samples.
Sub-branches
6 sub-branches with Somali samples