[SPOILERS] The Convocation of Fourteen

[Daralii]

With the revelation of Emet-Selch's true name is Hades (a summon from FF7), and the possibility that the form he took was his real form during the fight with him, I see small similarities also to the Esper World in FF6 and Feymarch from FF4. Beings with incredible power that wear robes and normal clothes like any other person, but their true forms may be something different. With that in mind, if we were ever to look for the true names of the 14, we might be needing to look at other FF game summons for their true names. I'm personally still of the mindset that the 14th's true name is Maduin, since if we go under the assumption that the WoL is the soul of the 14th, then the 14th has a habit of being a guardian that protects people just as Maduin in FF6 was a higher ranked Esper who was the guardian of the Esper World.

If we stick to espers, the wiki at least says that Zodiark in XII is sometimes called Ashlesha Ascendant, which references the Sanskrit name for Serpentarius. Ashlesha as 14's title is as good a guess as any.

Edit: Just remembered that Unukalhai's an old Arabic name for one of the stars in Serpentarius. They've pulled from Zodiark's constellation twice now, as Sabik is another star in it, so I definitely wouldn't be surprised if 14's name and/or title is also somehow related to Serpentarius.