Three entries with the name Elaine.
In the Didot-Perceval, either Gawaine’s sister and the daughter of Lot, or Gawaine’s cousin and the daughter of King Viautre of Galerot. She became infatuated with Perceval when he first arrived at Arthur’s court. She is mentioned in the Prose Tristan.
Didot-Perceval | c. 1220-1230
Prose Tristan | 1230-1240
A French variation of Helen, the name ultimately derives from Greek mythology (e.g., Helen of Troy), and is borne by a number of people in Arthurian romance.