Sir Agravain is a minor character in Arthurian legend, a lesser-known nephew of King Arthur who serves him as a Knight of the Round Table. In the Vulgate and Post-Vulgate cycles, as well as Thomas Malory's Le Morte d'Arthur, he is a son of King Lot of Orkney and Anna/Morgause (Arthur's sister) and an accomplice of his evil half-brother Mordred.