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Not sure what BWA, SWA, NWA stand for, but this models Irish regions with other British Isles populations. All of Ireland can be modeled primarily with southern Scotland type ancestry. But the percentages differ.
The challenge here is that they are trying to model all of Irish ancestry with only British Isles clusters, which means Norman, Viking, and Germanic ancestry is getting absorbed by other clusters. Still, this is what we see:
Overall, Scottish-like ancestry is higher the further north you go in Ireland, while English-like ancestry increases in the southeast, south, and Connacht. However, all regions of Ireland except Wexford are more Scottish-like than English-like.
NW Ulster and North Leinster/Ulster, unsurprisingly, owe the largest share of ancestry of all Irish clusters to Scotland, making up over 70%. Affinity to the English clusters Cheshire, Kent, SE England, Devon, and Cornwall are low.
Connacht has greater English-like ancestry and less Scottish-like ancestry than the above, but primarily associated with Cheshire, not with the SE England cluster. There is some affinity to Kent, however, which is also in SE England.
Central Leinster and South Leinster/Munster have more Scottish-like ancestry than Connacht but less than NW Ulster and Northern Leinster/Ulster, and similar amounts of English-like ancestry as Connacht.
Wexford, also in Leinster province but separated here for its genetic distinctiveness, has only about 40% Scottish-like ancestry and almost 30% of ancestry in the SE England cluster, which makes this region an outlier for Ireland. This should not be a surprise given a large Anglo-Norman presence and, until recently, a very archaic form of Old English survived there called "Yola" which is a descendant of the early English spoken by the Normans.
N Munster, SW Munster, and Cork have less Scottish-like ancestry and more English-like ancestry than Leinster and Connacht. Of these, Cork has more affinity to Cheshire and less to SE England than the other clusters.
https://www.biorxiv.org/content/bior...1/230797-7.pdf
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