Sex between the Races Lore?

[Bhearil]

This makes me wonder...was the ancestor of the Miqote a Hrothgar-Hyur hybrid?

Miqo'te hail from Meracydia (mentioned on 2.5) alongside centaurs, an unnamed tree-like race and the Bahamut and Tiamat brood. The "Winded-up Mithra minion" states that the Mithra are supposedly the ancient ancestors of the Miqo'te

[Enkidoh]

Miqo'te hail from Meracydia (mentioned on 2.5) alongside centaurs, an unnamed tree-like race and the Bahamut and Tiamat brood. The "Winded-up Mithra minion" states that the Mithra are supposedly the ancient ancestors of the Miqo'te

The miqo'te coming from the southern islands is an old bit of 1.0 lore that is deliberately vague so take it with a grain of salt (the Dunesfolk lalafell and the ACN class were also supposedly from there as well).

As for the wind-up mithra, that is merely a fanservice reference that is actually a meta one - the original FFXIV races really were created game-development wise based on FFXI's races like the mithra as FFXIV 1.0 originally was planned early in it's development to be FFXI's literal successor, and that then FFXI players would be expected to be moved into the new game with their existing character data intact, hence the character races needed to be similar.

Not surprisingly FFXIV's original producer Hiromichi Tanaka (who was also FFXI's original producer) quickly realized this concept was going to be completely and totally unworkable so that idea was scrapped and FFXI retained as a seperate game, with FFXIV 1.0 considered a spiritual rather than a literal sucessor to FFXI, and the similar races were retained as merely a means of attracting FFXI players into the new game. So the wind up mithra, elvaan and tarutaru minions jokingly refer to this in their flavour text about being "supposed ancestors" of the miqo'te, elezen and lalafell respectively, because they are, from a meta, rather than literal lore point-of-view.

Also the Allagan automata that are still active on Azys Lla refer to the player character's race as is, meaning the FFXIV races existed as they are now at least as early as the Third Astral Era, if not earlier, which makes the descriptions of those minions even more tongue-in-cheek and not to be taken seriously.

[YianKutku]

The miqo'te coming from the southern islands is an old bit of 1.0 lore that is deliberately vague so take it with a grain of salt (the Dunesfolk lalafell and the ACN class were also supposedly from there as well).

Minor pedantry: the South Seas Islands (or "Southern Islands" or "South Seas Isles") are supposedly where all Lalafells come from. The ones that went to Vylbrand founded Nym, and when the Sixth Calamity happened, they went back to the South Seas Islands, before returning in the Sixth Astral Era as Plainsfolk (and re-introducing Arcanima to Eorzea, starting from Limsa Lominsa). The ones that went to mainland Aldenard founded Mhach, and when the Sixth Calamity happened, they wandered around the deserts of Thanalan and became Dunesfolk, before founding Belah'dia.

The continent of Meracydia is something entirely different, and implied to be farther south. I think the original 1.0 lore was that Miqo'te come from there, and this remains in some item descriptions that associate Meracydian plants and ingredients with Miqo'te origins.

However, the first lorebook says Miqo'te came from Ilsabard during the Fifth Calamity (of Ice), and then also said Miqo'te were from Eorzea even before that, migrating en masse over to Ilsabard during the Third Astral Era. So that seemed like a retcon.

When asked about this, Koji Fox said that there were lots of "ice ages" where the seas "froze over", and Miqo'te migrated all around during these, so apparently both the Eorzean/Ilsabardian and Meracydian origins are true? Honestly it kind of sounds like he was trying to handwave a vague answer to avoid a straight retcon.