In my mind, the WoL comes off as too much of a wild card to have been originally from Amaurot, so their real name is likely not Greek or Greek related. I settled on Maduin. Due in part to the references to FF6 and FF9, and because in Japanese they are basically the same name, with the only difference being whether or not you sound out the "e" sound short or long. So basically the difference between Madin (male) and Madeen (female) in pronunciation. Reference reason chosen below. Spoilers for those who have not played FF6 or FF9.
In both games Maduin/Madeen is the guardian of a world, is held in high regard, and is incredibly strong. Fits Azem to a T.