How Welsh is the US?

Ancestral Background of US Presidents
Learning Comparison | 9 Dec. 2023
https://www.youtube.com/watch?v=1sGUkWgxrpI

2:10 First 21 presidents involve one Dutch (number 8), three purely English (even later), one purely Celtic Fringe, two English and French (including George Washington), and the other fourteen are a mixture of English and of Celtic Fringe (including one with French admixture too). Most Celtic Fringe heritage is Welsh.

Is the US a kind of revenge by St. Joan of Arc and by Llewellyn ap Gruffuth?