Cecil once wrote about Irish names that sound Spanish, like Costello and Spain. I’m curious about this phnomenon in other ethnic groups, too - names that don’t seem to match up with the ethnic group they’re normally associated with. A few I can think of off the top of my head:
Rothschild - Ashkenazi Jewish
Martin - in New Mexico, it’s a Hispanic name
Smith - in Las Cruces, New Mexico, the vast majority of Smiths I encounterd were Hispanic
Park - Korean
Any others that you can think of?