While going through the "Lord of the Rings" cast list, Candi discovered a bunch of characters who she didn't recognise from the books. I took this as a challenge, and through the joys of google managed to find all but one of them. The final character, Lurtz the Uruk-Hai, was made up for the movie.
Why? It's not like LOTR is short of characters, think how many they'll have had to cut just to make the trilogy short enough for three movies. With all the characters they've cut, why risk alienating the fans by going back and adding ones that weren't in the books?