The nocturnal Miqo'te are the Keepers of the Moon (like me ). They have eyes designed to see well in the dark, and they have a powerful sense of smell.
If you haven't read this link below, please do. It answers your questions about naming conventions and gives you info on some of their lore.
http://www.ffxiv-roleplayers.com/wiki/index.php?title=Category:Miqo%27te
This video is a bit annoying, but very informative. All lore on this video can be verified by going to the FF14arr Lodestone site.
As for averages, the character creator sort of forces you to say within racial averages. For example, it is impossible to make a Miqo'te as tall as an Elezen, or as bulky as a Roegadyn.
If you are trying to use a specific name. The only rules you have to follow to give your Miqo'te Keeper a traditional name are as follows:
Female Keepers of the Moon (the nocturnal Miqo'te) have names with one or two syllables. So, Deinaa works, or Dei works too. However, if you want to add a more Miqo'te sound to the name, I would throw in an 'h' somewhere.
Examples: Deinah, Dhei, Dheinaa, or anything else you can think of. Do not use Dei'naa. Female Keepers do not traditionally have any apostrophes or suffixes in their names.
I believe A'rytiss Edar already gave you a good answer to your other questions.
Another thread where players have made their own Keeper groups/tribes/clans is found here. The lore is vague on how a traditional Keeper society would function other than it would be matriarchal, and be made of two to three families. So the info in this thread is purely our best educated guesses based on tiny smatterings of lore put forth so far.
http://ffxiv-roleplayers.com/showthread.php?tid=5701
If you have any more questions, feel free to post more topics. Don't worry, no body will be bothered by it. Or, you can PM me.
Thank you, this is a lot of help.
Figured naming wasn't quite like WoW trolls, though looked ind of similar
I don't mind player-made lore either when it's educated guesses and works for most the community. Tmirai does the same thing and works for troll rp since Blizz is a pain with giving lore or changing it or changing a lot of things (and dismissing a large amount of lore from older books without reestablishing changes)
If I have any questions later on I'll ask then, thanks again