(Sir), of Wales. A knight of the Round Table, son of Sir Pellinore, and brother of Sir Lamerock. He went in quest of the St. Graal (q.v.). Chrétien de Troyes wrote the Roman de Perceval. (1541-1596.) Mebessier wrote the same in verse.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894