Moyés, Moysés, Moyses, Moyssés, Moÿs
A son of Simeon and relative of Joseph of Arimathea.
Following Joseph to Britain, Moses put on a pious facade, but was in truth guilty of lechery and fornication. He was exposed when Joseph’s followers were divided (either at the Grail Table, or at the English Channel).
Later, he brashly decided to sit at the Grail Table’s Perilous Seat and was either swallowed by the earth (in Robert de Boron) or carried away by hands of fire (in the Vulgate version). In the latter version, he was placed in the Perilous Palace in the forest of Darnantes, where he was destined to burn until freed by Galahad during the Grail Quest.
See also
Moys | The Legend of King Arthur
Sources
Joseph d’Arimathie | Robert de Boron, 1191–1202
Vulgate Lancelot | 1215-1230
Vulgate Estoire del Saint Graal | 1220-1235
Post-Vulgate Queste del Saint Graal | 1230-1240