If you look at Secret Ansem Report 3, it says about how Xehanort had plunged himself into darkness but also his five apprentices. Then it says their names : Even, Ienzo, Bleig, Dilin, and Eleus... When these nobodies formed the organization they changed their names and added a X. Well, if that's true, why is it that Xaldin and Lexaeus real name's are missing an A. And more importantly why is Xigbar's name totally different. Check it out yourself.