I'm not really sure if it does mean anything. It's from a character of a parody manga that makes plays on words, so it means something in the context of that manga. I suppose I could be a real name, but then I don't know a lot about Japanese culture to know if it's a common name. -chan is just a honourific to express endearment, mostly towards girls. It's also used for little boys, pets and even among lovers. it's sort of used to give a sense of childish cuteness.
This seems to be as I remember, from all the times I read Shogun many years ago.