Libeaus Desconus is a 14th-century Middle English version of the popular "Fair Unknown" story, running to about around 2,200 lines, attributed to Thomas Chestre. It is a version or an adaptation of Renaut de Beaujeu's Le Bel Inconnu though comparatively much shorter.

Gingalain Gingelein or Sir Gyngalyn/Gingalin, also known as Le Bel Inconnu, or The Fair Unknown, is a character from Arthurian legend whose exploits are recorded in numerous versions of a popular medieval romance. He was not even told his name, and unbeknownst to him, he is son of Sir Gawain and the fay Blanchemal.