I'm very very sure that it has never been told what his mother's name is...only his dad Kuroba Toichi Maybe they will reveal it in the upcoming Magic Kaito anime? :D
o it was sagte a few weeks Vor that there would be an Anime airing on april 17th but now its confirmed to only one special episode Wird angezeigt how he became kaitou kid.....one episode is better than none i guess :(