“Fair Unknown One”
Lybeaus Desconus, Lybeus Desconnus
An illegitimate son of Gawaine (his mother kept his ancestry a secret) and a knight in Arthur’s court.
He was sent to rescue the Lady of Sinadone, which he did, accompanying the damsel Ellen.
This character is identical with Guinglain, Lybius being his nickname; Lybius Desconus means “Fair Unknown One.”
See also
Fair Unknown | The Legend of King Arthur
Lybeaus Desconus | University of Rochester, Teams Middle English Texts, 2013