Lancelot du Lac (French for Lancelot of the Lake), alternatively written as Launcelot and other variants, is a popular character in Arthurian legend's chivalric romance tradition. He is typically depicted as King Arthur's close companion and one of the greatest Knights of the Round Table, as well as a secret lover of Arthur's wife, Guinevere. In his most prominent and complete depiction, Lancelot is a beautiful orphaned son of King Ban of the lost kingdom of Benoïc.
https://en.wikipedia.org/wiki/Lancelot