(a corruption of le bel inconnu, the fair unknown), a late 14th‐cent. romance in 2,250 lines previously attributed to Thomas Chestre (see Sir Launfal). Gingelein, the son of Gawain and Dame Ragnell, asks Arthur for knighthood and, since his name is unknown, he is knighted as Li Beaus Desconus. The poem is concerned with his adventures in rescuing the imprisoned Lady of Sinadoune. In Chaucer's ‘Sir Thopas’ the knight's name is given simply as ‘Sir Lybeux’.