Quote Originally Posted by Wolf Kanno View Post
(SPOILER)Ffamran Mid Bunansa is Balthier's true name (I love how his middle name is a reference to FFV ) (SPOILER)He changed it when he cut ties with the Empire. As for Gabranth, (SPOILER)that was his mother's Maiden name which he took when Landis fell and felt betrayed by Basch who still uses their Father's surname.

Hope this clears things up.
Where in the game do you actually find out about this?