MORGAN LE FAY
Mythology of Europe/England
Also originated with water spirit of Celtic Mythology
This is the mysterious fairy figure and spirit in the legends of King Arthur. She also goes by the names of FATA MORGANA, MORGAINE, MORGANA, MORGANE, MORGAN LA FAEE, MORGANETTA, and MORGUE LA FAYE. Originally, in the Arthurian legends she is the Lady of the Lake and the healing SPIRIT that takes the wounded Arthur to Avalon. In Malory’s Morte Darthur (ca, 1469), she is Arthur’s fairy half-sister, who plots the demise of Guinevere and Lancelot, and thus Arthur’s eventual downfall. MORGAN DE FAY also features in other works such as Ogier the Dane, Orlando Furioso, and Orlando Innamorto. Her magic is also considered to be responsible for the mirages of the Straits of Messina, which are known as Fata Morgana. It has been suggested that she may be derived from a mermaid or a Celtic water deity, and thus connected with Morrigan or Ireland and the Mari Morgan of Brittany.
Source: Spirits, Fairies, Leprechauns, and Goblins Encyclopedia