Ishgard variants for Elezen and Hyur

[Berethos]

Yep.
It works like this:
During the First Astral Era, Elezen were the first to inhabit Eorzea, living in its vast plains. Hyurs came and started to take over, so the Elezen left, some going north to Coerthas, forming Ishgard, and some going to the Shroud, forming Gelmora. From the Gelmora Elezen, some of them went underground, becoming the Duskwights, while those who stayed on the surface would eventually form Gridania with the Hyurs.

Except for the Astral Era part, this is essentially correct - the above happened early in the Sixth Astral Era (which lasted nearly 1600 years).

[Mimilu]

Except for the Astral Era part, this is essentially correct - the above happened early in the Sixth Astral Era (which lasted nearly 1600 years).

I meant "since" the First Astral Era. >///w///> ()

[Berethos]

I meant "since" the First Astral Era. >///w///> ()

Even then the above series of events is from the Sixth Astral Era. The various movements and migrations of the various races in Eorzea becomes less and less certain the further back you go, to where anything prior to the Third Astral Era has very little information, and the First Astral Era has almost none available.

That being said, the Elezen do believe they were the first, but that's largely based on their status at the start of the Sixth Astral Era.