Well, for some reason which goes against almost everything I wrote up there I consider Claudine, Claudette, and Claudia all the same name, so that doesn't bother me at all. *shrug*
Part may also depend if you're going for the meaning or the sound or both... I don't think of Claudia, Claudette and Claudine as the same name in and of themselves, but dif. feminizations of the same name.