Nice maps! Thanks for posting this.
I have a few comments:
In relation to
this map, you'll note that the highest concentration of persons claiming "US Ancestry" is in the Southern Highlands (ie. Southern Appalachia), parts of the Coastal South, and those areas of the more westerly South into which settlers from Appalachia moved after the Western Road through the Cumberland Gap was pioneered by Kentuckians such as Daniel Boone, Simon Kenton, and Davey Crockett.
I've occasionally heard these people criticized for being "ignorant of their origins," but in actuality, they are some of the longest-term White inhabitants of the Americas, and their bloodlines are generally a thorough mixture of Scots-Irish, English, Dutch, Palatine German, and French Huguenot (clearly making us predominantly Germanic, which is why I maintain that American Preservationism
is Germanic Preservationism

). When this deep and thorough admixture is taken into consideration, it's easy to see why we long ago stopped identifying ourselves with any one particular European ethnicity and established our own roots here in America.
In regards to
this map showing persons claiming "Irish Ancestry", you'll notice that they are also most heavily concentrated in Southern Appalachia. It is becoming increasingly clear that the vast majority of these people, while they almost certainly have
some green Irish ancestry, are also predominantly of Scots-Irish stock. Evidence has shown that these Scots-Irish immigrants to the Southland traditionally identified themselves as "Arsh" (our way of saying "Irish") in reference to their place of origin, Northern Ireland, and not necessarily to any sort of Gaelic inheritance. After all, if the green Irish were so heavily concentrated in this area, how would one explain the fact that this area of concentration roughly coincides with the "Bible Belt," America's hotbed of Protestant fervor?
Very interesting comments. You've answered some of my questions.
Anyway, thanks again for the maps and stats. Good info.

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