Considering how close the name "Azeyma" is to "Azem", and that Azem's constellation symbol is the sun which is also what Azeyma is the goddess of, I think it would be weird if some random Ancient is supposed to be Venat's inspiration for Azeyma and not Azem.

IIRC, like The Watcher, the Twelve are Hydaelyn's creations inspired by Venat's friends, not the actual people themselves.