Well, if it were fan-made, they'd probably be different terms. Also, we wouldn't quite know what to call the ones who are currently titled "Uchi". So they must come from somewhere important.
I just got them from the strategy guides. Wild World's guide lists the personality a villager has along with their catch prhase and the comment that goes with their photograph.
Sadly the New Leaf guide is not so kind. So I have to have people confused when I refer to Uchi as 'Tomboy' (which is the closest word I have for them).