“Wicked Knight”
Chevalier Mesfait, Le Chevaler Mal Fet
The alias adopted by Lancelot after he recovered from a period of insanity and lived alone on the Joyous Island (Island of Joy).
After ten years, he was coaxed back to Arthur’s court by Hector and Perceval.
Sources
Vulgate Lancelot | 1215-1230
Post-Vulgate Suite du Merlin | 1230-1240
Le Morte Darthur | Sir Thomas Malory, 1469-1470