The proper name given to the King with a Hundred Knights in the early prose Lancelot tales. The King is given other names in other sources, and in Lancelot of the Laik, Malaguin and the King with a Hundred Knights are separate characters, although both are kings in Galehaut’s service. Margon, the King’s name in the Third Continuation of Chrétien’s Perceval, may originate with Malaguin.

Maleginis is one of the possible names of the King with a Hundred Knights, one of the eleven rebellious leaders at the outset of Arthur's reign, though he has also been identified with Berrant Les Apres and Aguysans.