Click here to download our 2019-10-03 draft tree for I-A8742
For reasons of legibility, we have created a new draft tree specifically for the I-A8742. This haplogroup has a most recent common ancestor who lived approximately 6400 years ago, according to YFull's calculation. But it's a small haplogroup, and all known I-A8742 members have paternal origin from Great Britain and France.
I-A8742 includes Ken Nordtvedt's Isles-B5 cluster and some other branches that don't match the cluster very well. But even Isles-B5 was poorly defined by STR marker patterns. And I-A8742 is part of the larger I-A1150 haplogroup which includes the Isles-B3 cluster and additional branches that don't match Isles-B3 very well.
Click here to find our previous tree for I-L161, which included information on I-A8742
Click here for a brief description of the I-A8742 haplogroup