After extensive searching, I have found the most extensive records of the family trees of Final Fantasy. Extensive!
(SPOILER)
Whee. I can only imagine that BOU/Krel/DanWalkie/Asorie are actually the eldest people in this three, and BOU just left Sir Krel at some point and hooked up with a much younger babe in Kalen. Beyond that, I think this covers as much as I can manage from previous EoFF Family Trees. I would suggest this is the starting point for the overall family tree.
Also, I know I'm a terrible person, but I have clearly since divorced Etienne and hooked up with smittenkitten. I can also confirm from the FFXIV linkshell that EoFF members Steelyangel and Valerna are sisters, although their parents/children/etc. are not registered here, so I can't go any further than that in detail. smitten and I also have a kid called Kukki who hooked up with Steelyangel, however since Kukki isn't registered here I guess we'll have to leave it out (or I can hunt him down and get him to finally register...).
EDIT: Beaten by Denny!