Manasses
One of Arthur’s knights who was accused by a friend of sleeping with his wife, bound him, and nearly threw him in a well to drown.
While escaping from Arthur after her attempt to destroy him and Uriens, Morgan le Fay found Sir Manassen bound and about to be drowned by another knight.
Manassen was of Arthur’s court, but he was also the cousin of Sir Accolon, Morgan’s recently killed paramour. For Accolon’s sake, Morgan freed Manassen. After drowning his former friend, Manasses delivered a threatening message from Morgan to Arthur.
Sources
Post-Vulgate Suite du Merlin | 1230-1240
Le Morte Darthur | Sir Thomas Malory, 1469-1470