Muggles' Guide to Harry Potter/Characters/Gibbon

Overview
Gibbon (no first name given) is a Death Eater who takes part in the battle at the Hogwarts Astronomy tower.

Half-Blood Prince
Gibbon is one of the Death Eaters who takes part in the Battle under the Astronomy Tower at Hogwarts. When we first see him, he is dead; a large, blond Death Eater, who we later learn is Thorfinn Rowle, had tried to kill Remus Lupin, and Lupin had ducked. The curse had hit Gibbon, who had apparently run up to the top of the Astronomy Tower to conjure the Dark Mark, and was then returning to the battle.