I have a few black cousins with the same last name (long story).
When I applied for jobs out of college, I was interviewed by one company who did some research, saw my last name, and assumed that since my cousin was black and a lawyer I was black.
Made for a VERY awkward discussion by with the HR manager. I didn’t list race on the application, and they had made an assumption because my last name isn’t common.
Interesting story.
*Fake ethnicity* ...so you’re the one who started it! :)