Sir Agravain (sometimes spelled Agravaine) is a Knight of the Round Table in Arthurian Legend. In Chrétien de Troyes, the Vulgate, Post-Vulgate cycles and Thomas Malory's Le Morte d'Arthur, he is the second eldest son of King Lot of Orkney with Anna/Morgause (Arthur's sister), thus nephew of King Arthur, and brother to Sir Gawain, Gaheris, and Gareth, and half-brother to Mordred.