Billy Pilgrim of Kurt Vonnegut's Slaughterhouse-five
Billy Elliot of the film and musical
Billy Nutter, character in the ABC Family TV show "Jane by Design
Billy, main character in Cartoon Networks "Grimm Adventures of Billy&Mandy"
Billy Cranston, BluePowerRanger from Mighty Morphin Power Rangers and Power Rangers Zeo
Billy Madison, from movie "Billy Madison"