Fenrir

Possibly means "fen-dweller", derived in part from Old Norse fen "marsh, moor, swamp". In Norse legend this was the name of a giant, monstrous wolf - Loki's son by the evil giantess Angrboða - who was destined to kill the god Odin at the final battle of Ragnarök. J. K. Rowling borrowed the name for a werewolf in her 'Harry Potter' novels, and a moon of Saturn was named for Fenrir in 2005.