If you find a good source on it, please let me know! In my wild google trip yestereve looking for Poe's moiety it seemed to mostly be a lot of wild extrapolation by white people based on archaeological floorplans and king lists. (I did manage to find someone who was complaining about how they were all ignoring *modern* Maya kinship structures, but then he didn't manage to explain those coherently either.) I basically got as far as Sedoretu AU!Poe is a Sun person who is looking for Moon partners (although the Sun/Moon moieties were probably not Ki'O style exogamous? If they even existed at all?)