"The Lady of Shalott is based on the story of Elaine who in other stories was the unloved wife of Lancelot and the mother of Galahad. She is also called the Donna di Scalotta which was the Italian memory of her name Scota or Scotia. She is also remembered as Elaine of Astolat or Ascolat as well as Elaine of Corbenic, Elaine the White and Elaine the Fair. She is also associated with the Lady of the Lake in some legends and in others she is called the Grail Maiden or Grail bearer."
Lancelot and Elaine—Then to Her Tower She Climbed and Took the Shield, Thus Kept it and So Lived in Fantasy. The Idylls of the King, Alfred Tennyson Eleanor Fortescue-Brickdale 1871-1945, via Maulleigh