Nimue/Origin

Origin
Lady of the Lake is the titular name of the ruler of Avalon in the Arthurian legend. She plays a pivotal role in many stories, including giving King Arthur his sword Excalibur, enchanting Merlin, and raising Lancelot after the death of his father. Different writers and copyists give her name as Nimue, Viviane, Elaine, Niniane, Nivian, Nyneve, and Evienne, among other variations