The Faerie Knight was, in the Matter of Britain, a bastard son of Tom a'Lincoln and Caelia, the Faerie Queen. His proper name is never given. He appears in Richard Johnson's romance Tom a' Lincoln.
Tom himself was a bastard of King Arthur with Angelica, daughter of the Earl of London. Therefore, the Faerie Knight was, like Melehan, Melou and the Black Knight, Arthur's grandson.
Being half-faerie, the Faerie Knight inherited some of his mother's magical talents. He met his half-brother, the Black Knight (another bastard of Tom's), and they traveled together on many adventures.