Quote Originally Posted by Iscah View Post
Whatever is going on, it's more complicated than that. Azem isn't one of those twelve, but got a goddess named after them regardless.
I think this has been explained as the names like Emet-Selch, Lahabrea, and Azem are the title held by the seat and isn't the real name. Furthermore, if our original Ancient self decided to defect because of Zodiark but then also refused to join Hydaelyn (as told in the cutscenes with Venat) it stands to reason that their copycat convocation (Venat's Hydaelyn convocation) would still use the titles of office for the seats, every easily giving the Azem title to someone new.