I've actually had many people guess that I am Jewish - I guess the Midwestern stereotype that all Jewish people have big curly hair and a larger nose fits me.
And I don't really mind if people make that assumption - why would it be negative to be thought of as a different ethnicity than I am? Maybe I AM part Jewish - who knows?! And even if I'm not, I think Jewish (ethnically-wise, not necessarily religion-wise) are beautiful! So this is actually a compliment to my boring European self.