Just look at the other side of the state where the Dingell family has held the throne since 1933 and that’s just a father and son.
Dingell senior changed the family name from Dzieglewicz to run for the seat with the catchy slogan of “Ring with Dingell”
A real Dingell-ing!!! I wouldn't blame dad for changing that name. Hard to get elected with a name no one can pronounce, regardless of anything else. He wouldn't have been the first Polish (or Italian, or Jewish, or whatever) American to Anglicize his or her name, nor the last. Nowadays, though, if your family name is Spanish-sounding, you'd be better off to keep it as it is.