In a message dated 8/19/2011 7:54:56 P.M. Central Daylight Time, donmilligan@comcast.net writes: I understand there are some histories of Wales, written in the early 1900,that indicated some Irish raiders from the east central coast of Ireland came into Wales and some of them settled in Wales. Some of these Irish raiders were likely Celtic M-222+. Their descendants mixed in with the Welsh Celts, and spread all the way into northern England, southern Scotland, and northeastern Scotland. There's a fair amount about that in the literature. Google flight of the Deisi to find some of it. There aren't many specific Irish tribes named though. I think the Ui Liathain are another. There are also notices of a northern British tribe returning to northern Wales to throw out the Irish kings. And in Irish sources a statement that the Irish kings spent as much time in Wales as in Ireland. Nothing specific though. Nothing to tie in with M222 although you can't rule it out. The following is from Wikipedia: " The Uí Liatháin are known from both Irish and _British_ (http://en.wikipedia.org/wiki/Great_Britain) sources, respectively the _Sanas Cormaic_ (http://en.wikipedia.org/wiki/Sanas_Cormaic) _[4]_ (http://en.wikipedia.org/wiki/Uí_Liatháin#cite_note-3) _[5]_ (http://en.wikipedia.org/wiki/Uí_Liatháin#cite_note-4) and _Historia Brittonum_ (http://en.wikipedia.org/wiki/Historia_Brittonum) ,_[6]_ (http://en.wikipedia.org/wiki/Uí_Liatháin#cite_note-5) to have had colonies in _Wales_ (http://en.wikipedia.org/wiki/Wales) and _Cornwall_ (http://en.wikipedia.org/wiki/Cornwall) . According to the Historia Brittonum they were driven out of _North Wales_ (http://en.wikipedia.org/wiki/North_Wales) by _Cunedda_ (http://en.wikipedia.org/wiki/Cunedda) and his sons._[7]_ (http://en.wikipedia.org/wiki/Uí_Liatháin#cite_note-6) Alongside the Uí Liatháin in this region of Britain were a significant force of the so-called _Déisi_ (http://en.wikipedia.org/wiki/Déisi) , whose story is told in the famous _Expulsion of the Déisi_ (http://en.wikipedia.org/wiki/Expulsion_of_the_Déisi) already mentioned above,_[8]_ (http://en.wikipedia.org/wiki/Uí_Liatháin#cite_note-7) as well as a smaller population of the _Laigin_ (http://en.wikipedia.org/wiki/Laigin) . Neither are specifically connected to the Uí Liatháin, or connected to each other, in any of the Irish sources, but collaboration can certainly not be ruled out, especially in matters relating to trade, including the slave trade. The Déisi Muman lived adjacent to them in the neighboring _County Waterford_ (http://en.wikipedia.org/wiki/County_Waterford) and the Laigin could be found not much farther east in the Kingdom of _Leinster_ (http://en.wikipedia.org/wiki/Leinster) . The Uí Liatháin can, however, be associated easily with their apparent relation _Crimthann mac Fidaig_ (http://en.wikipedia.org/wiki/Crimthann_mac_Fidaig) , the legendary _King of Munster_ (http://en.wikipedia.org/wiki/King_of_Munster) and dominant _High King of Ireland_ (http://en.wikipedia.org/wiki/High_King_of_Ireland) of the 4th century. They are mentioned not only in the same passage in the Sanas Cormaic,_[9]_ (http://en.wikipedia.org/wiki/Uí_Liatháin#cite_note-8) _[10]_ (http://en.wikipedia.org/wiki/Uí_Liatháin#cite_note-9) but are close relations in all the earliest genealogical manuscripts. In a 1926 paper, _Eoin MacNeill_ (http://en.wikipedia.org/wiki/Eoin_MacNeill) discusses the movements of the Uí Liatháin at considerable length, arguing their leadership in the South Irish conquests and founding of the later dynasty of _Brycheiniog_ (http://en.wikipedia.org/wiki/Brycheiniog) , figures in the Welsh genealogies matching Uí Liatháin dynasts in the Irish genealogies. He argues any possible settlement of the Déisi would have been subordinate until the ousting of the Uí Liatháin by the sons of Cunedda. The founder of Brycheiniog, _Brychan_ (http://en.wikipedia.org/wiki/Brychan) , is in all probability the early dynast Macc Brocc (for whom see below), while the name Braccan also occurs early in the pedigrees of the Uí Fidgenti and Uí Dedaid, close kindred of the Uí Liatháin. MacNeill further associates this with the sovereignty in Ireland and conquests in Britain of their cousin germane, the monarch Crimthann mac Fidaig._[11]_ (http://en.wikipedia.org/wiki/Uí_Liatháin#cite_note-10) John