Morgue
A wizard who created a jar of magical ointment that was used by the Lady of Norison to heal the insane Sir Yvain in Chrétien’s Yvain, the Norse Ivens Saga, and the medieval tale of Ywain and Gawain.
Chrétien and Ivens call Morgan a female, but the Ywain mentions Morgan as a male. Chrétien, the originator of the character, probably had Morgan Le Fay in mind.
Sources
Yvain, or Le Chevalier au Lion | Chrétien de Troyes, late 12th century
Ivens Saga | 13th century
Ywain and Gawain | 1310–1340