Having been a tour hostess through
The Nationality Classrooms, I've learned to never paint such a wide brushstroke over any group of countries! I've seen people come close to fisticuffs over centuries-old borderlines!
FWIW, what I've been told (and have discovered through genealogy), my ethnic background is Scots, Irish, English, and German/Swiss. I expect that there could be some Iberian and/or Nordic, due to the Irish, but we'll see. I'm sure that there will be a surprise or two!