Lol, same here :). I tried Mrs Howell after "milionaire" gave me the husband's name, but that wasn't enough. Been too long since I watched any of those episodes, and I'm not sure all the names were the same in my language anyway.
That's the only way a lot of us were able to get 100%. Never seen an episode of the show, but know the theme song pretty well. Couldn't tell you why, though.
Professor = Pride
Ginger = Lust
Mary Ann= Envy
Mr. Howell= Greed
Mrs Howell= Sloth
Skipper= Anger
Gilligan= Gluttony