Arthur’s illegitimate son by Margawse. Mordred is destined to kill his father someday, and Arthur attempts to have him killed as a child by sending all children born in the month of his birth on a ship to be sunk, but Mordred alone survives. He participates (along with his brothers) in the killing of Lamorak, and finally turns against Arthur when Arthur is off fighting Launcelot abroad. Mordred’s very existence is a testament to the book’s fascination with royal lineage and destiny, especially when tied to the omnipresent tendency to competition and jealousy—seeming to make it inevitable that a son will rise up against his father.