Your observation about Scotland prompted me to remember Jim Webb’s book, “Born Fighting”, about the 18th Century influx from Scotland and Northern Ireland into the US and how they became a source for the military forces. This became geographically-centered in the South and Appalachian areas and carries on today as shown in the dark blue on the map.
The part of NW Florida where I was born and reared was settled very early by Spanish but then came waves of Highland Scots mostly from the Western Islands. My Mother’s Clan, The McDuffies came from the island of Colonsay. They probably came after Culloden as one of her ancestors fought there.
Also a few Scots Irish. All of them originally landed in Virginia or more likely Wilmington North Carolina.
In 1960 over 60% of the population of Walton County had Scottish surnames. My high school was full of beautiful girls, and I mean full of them. I think they must have been from handsome stock.