I finally got a female (Moma) who is a master in all 5 fields....but nothing happened, she isn't even an esteemed elder since I already have 51 totems. I can't remember what the special island event was that gave me the 51st elder though.

Here's a tip...there's a stew recipe that will make your villagers live a looooooooooooooooong time if they eat it. My oldest villager lived to be 97