Sergio, come on man. With a name of Aitor Begiristain Mújica - that's a Vasco. Txiki was just nickname. Besides, Catalán names are actually for of form: Sobregrau, Diumaró, Senillòsa, etc. with them mainly finishing with a vocal with a few exceptions like Planes, Oros, Lull etc.
ps. Will be...