Well it's not really a nickname more of a mispronounciation. My last name seems to remind people of the Sound of Music and so when they hear it instead of repeating it correctly they say Von Trap. Or another one is Von Tramp, which is sort of a combination of the two. I don't really mind, but it gets annoying sometimes though, like when I'm at school and though I've been there for years now, they still spell it incorrectly!