A Big Y for an Irish/Norwegian cluster: 2019-09-15 tree for I-Y11222

Click here to download our 2019-09-15 tree for I-Y11222

I-M26 has two major branches, I-L160 and I-Y11222, and there are also some I-M26 men who don't belong to either branch.

I-L160 and I-Y11222 are both found throughout Western Europe: Iberia, France, Sardinia, the UK and Ireland, Germany etc. But I-L160 is much more common than I-Y11222. And maybe more of I-L160's population is found in southwestern Europe, and maybe I-Y11222 has a larger percentage of its members in northwestern Europe.

There is a STR marker cluster that contains three known families: two live in western Norway, one is Norwegian-American and one is Irish-American from County Limerick (Limerick City was founded by the Vikings, as were all Irish cities).

Based on the STR variance, maybe the common ancestor of these families lived approximately 1000 years ago. Was the founder of this lineage from Ireland, from Norway, or from somewhere else? I-M26 is quite typical of Ireland but unknown in Norway other than this cluster.
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This update shows a Big Y-700 result for the Irish member of this cluster. He is in a branch with a previous Big Y-500 for an Irish-American man who doesn't match the cluster well, and their common ancestor must have lived over 2,000 years ago (it's difficult to calculate MRCAs when comparing Big Y-500 and Big Y-700). Our tree calls their branch I-Y45216, maybe YFull and FTDNA will choose different names.

Both I-Y45216 men have the distinctive STR marker value DYS413=19-20. (Most of men in I-M26 have DYS413=21-21 or 21-22). The small I-Y45216 branch has a much larger parallel branch named I-A14285 usually has DYS413=19-22. So the common ancestor of these branches probably had a low value at this marker: 19-20, 19-21, 19-22, 20-21 etc.

I-A14285 is most common in Great Britain but after we had found more than 20 British families in this branch, we began to find a few from France, Spain, etc. Sometimes we think a branch is restricted to Britain and Ireland, but eventually we find continental members.
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This update also shows a new big Y for Y15580. The I-Y15580 branch has a MRCA who lived 3900 years ago, according to YFull's calculation. All known members of I-Y15580 are Irish and British, mostly Irish. But it's a rare branch, and maybe eventually we will find continental members.




Click here to find our previous tree for I-Y11222
Click here for a brief description of the I-Y11222 haplogroup