Pity the kid who'll have to grow up hearing that all his life...he'll probably ask to go by Mark instead.
Yep, he'll have to deal with that.
Reminds me of a girl I once knew named Christmas. I met her some years ago on vacation--she was the older sister of one of my brother's friends. Anyway she hated her name because of all the jokes, and usually went by Christie instead. In fact, I didn't know her 'real' name until her mother called her by it.