We had 2 Betsys and several Carols... oh, and some Karens also.
I saw a video of foreign born residents in the US from 1850 up. I grabbed these screenshots
because it started with Irish miles ahead but coming upon WW I and WW II the large Italian
and German born must have caused some concern.
The other thing was Mexico lagged. On the list in 1902, didn't pass the Irish until 1940,
and Russians in 1963, but grabbed the lead in 1971 and skyrocketed.
https://www.youtube.com/watch?v=C8Cu3VGdq3A