Son of "Goyle" (Death Eater). One of Draco Malfoy's thugs. In Harry Potter and the Deathly Hallows Part 2, he accidentelly killed himself by casting cursed fire (Fiendfyre). Although in the book it was Vincent Crabbe who died, but due to drug charges to the actor, they replaced him with Blaise Zabini.
Chamber Of Secrets
Prisoner Of Azkaban
Goblet Of Fire
Order Of The Phoenix
His first set was Slytherin 4735 in 2002. Goyle's second and last appearance was in Hogwarts 4867 in 2011.