23. Many of what you might call "Ulster Scots" are listed as Irish
Not making a political statement here, that's just the way it is. The waves of Scots-Irish who immigrated from Ulster, especially in the early part of the 18th century, are not oft listed as an identity. There were also a lot of early immigrants from Scotland but not as many as those who came from Ulster.
Yep, there are a LOT of folks who come from German stock. I think many downplayed their German ancestry after the world wars. Some even Anglicized their names.