Origin Country for each Race?

[Vanguard319]

According to the lore, Eorzea is pretty much the ancestral homeland of the Elezen, all of the other races migrated from other lands. I don't see visiting other lands coming for quite awhile.

[Eruantien]

Boasting the largest population in Eorzea, the Hyur came from neighboring continents and islands in three great migratory waves

possible in some expansions I would imagine

The Lalafell were originally a group of agriculturalists inhabiting the fertile islands of the south seas. With the introduction of transmarine commerce, they soon found their way to Eorzea via trade routes.

Again possible, but probably less likely

The Elezen are a traditionally nomadic people who in former times claimed sole dominion over Eorzea

As already mentioned. Get off our land!!

The Roegadyn are a maritime people whose largest concentrations are found in the northern seas, by way of which they came to Eorzea.

Unlikely as they live from fair away lands.

During the Age of Endless Frost, as the seas turned to ice and passage over them became possible, Eorzea saw an influx of foreign fauna to her shores. This in turn brought the hunting tribes which subsisted upon them, the modern descendants of whom are today known as the Miqo’te.

Seem nomadic and weren't what Mi'qote are today, so you could say they are new races and started life on Eorzea.