Taranis
Elite member
The probelm though is there is no archaelgoical signs of mass movement from Ireland into Scotland during the early medieval period. The archaelogy is actually continuous from before the 4th century. Also the biggest subgrouping of L21 in Scotland appears to be the "Scots Modal" which is only present in Ireland generally among men bearing non-irish surnames (mostly scottish).
The reason I brought this up was because of the fact that in the 2nd century AD, all of Britain up to the far north appears to be P-Celtic (I'm trying to avoid the term "Pictish" because that's very probably an artifact of the Hadrian's Wall), with P-Celtic tribal names even inside the area of the later Dál Riata. Something must have happened in the following centuries if people switch to a different language.
the main areas for M222 in Scotland are in the Eastern Lowlands which were never "Gaelic speaking" they were Brythonic and then Anglic speaking. The area is the core of the "Scots" language. Likewise it's quite common over the border in North-east England. the Varience calculations tend to point to it been oldest in England followed by Scotland and youngest in Ireland. The Irish M222 has all the signs of a major "founder effect" going on. Interesting enough the core of the M222+ region in Ireland is adjacent to groups who are showing up as L513+ and DF21+. Likewise further east you have specific I2b2 that is associated more with Scotland then the rest of Ireland and shows up in groupings tied to La Tène material culture in Ireland. The north east been where the highest amount of finds have been found.
In general though La Tène material culture finds are nearly all restricted to "Leath Conn" with next to nothing found in Leath Mogha. Interesting enough the vast majority of Ogham stones in Ireland are in Leath Mogha.
These are interesting points I was unaware, however.