A question for the crowd

[stillsostrange]

I named a character once in The Bone Palace, an offhand reference that didn't warrant an entry in the dramatis personae but is still in print. Now I find myself needing to write more about that character and a) not liking his name much anymore, and b) finding it a bit too similar to someone else who shows up quite often. How many of you would be wildly irritated if I changed someone's name between books? (I doubt most people even remember that he was ever mentioned, but somewhere out there is the reader who will.)