Question about Sun-Seeker Mi'qote...

[Fenral]

I believe in that case they have the option of forming their own tribe, with a two-letter prefix (as the 26 single letters are taken), though I cannot for the life of me remember where I'm getting that two-letter rule from. The newly spun-off tribe would have to either bring in more females (but not males), or simply dissolve itself after a generation.

But all that's assuming the couple chooses to be honest about the paternity. Supposedly, Miqo'te females are only interested in getting it from the strongest man in the clan, but there's enough inbreeding going on that I think it's entirely possible for a child from an atypical union to pass for a child of the current nunh.

On a somewhat darker note, it's also entirely possible that the female could simply abort without the male's knowledge. Tansy was the herb of choice in the (real-world) Middle Ages, so it's not unlikely that a similar herb is used the same way in an early-industrial setting like Eorzea. Condoms were also a thing as far back as (real-world) 1640! The more you know.

That said, I also doubt a tribe would simply abort any developing fetuses sired by a deposed nunh, so that loophole probably exists as well. One could claim a child to have been sired just a few days earlier than the actual truth, and nobody can really prove otherwise, but there will always be rumors. (Feel free to use this as an RP backstory if you like.)