u/Quick-Eggplant2453

Anyone that knows much about haplogroups? I found the haplogroup of my great-grandfather from a first cousin of his. His male line haplogroup was J-BY41190. Apparently, it is a very rare Jewish haplogroup. Note: I am not Jewish, and none of my family is, though I had some Jewish ancestors. Just curious if anyone who knows a lot about haplogroups can explain them to me—if that makes sense—and if anyone else has it. my great grandfathers family from south central italy