Three entries with the name Elaine.
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.
Sources
Didot-Perceval | c. 1220-1230
Prose Tristan | 1230-1240
Elaine
Alyne, Eleine
Daughter of Pellinore. She killed herself after the death of her love, Sir Miles of the Laundes.
See also
Alyne | The Legend of King Arthur
Eleine | The Legend of King Arthur
Elaine
A niece of Arthur, variously described as a daughter of Lot or Nentres. She fell in love with Percival.
Note
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.