Mordred or Modred (/ˈmɔːrdrɛd/ or /ˈmoʊdrɛd/; Welsh: Medraut or Medrawt) is a major figure in the legend of King Arthur. The earliest known mention of a possibly historical Medraut is in the Welsh chronicle Annales Cambriae, wherein he and Arthur are ambiguously associated with the Battle of Camlann in a brief entry for the year 537. Medraut's figure seemed to have been regarded positively in the early Welsh tradition and may have been related to that of Arthur's son. As Modredus, Mordred was depicted as Arthur's traitorous nephew and a legitimate son of King Lot in the pseudo-historical work Historia Regum Britanniae, which then served as the basis for the following evolution of the legend from the 12th century. Later variants most often characterised Mordred as Arthur's villainous bastard son, born of an incestuous relationship with his half-sister, the queen of Lothian or Orkney named either Anna, Orcades, or Morgause. The accounts presented in the Historia and most other versions include Mordred's death at Camlann, typically in a final duel, during which he manages to mortally wound his own slayer, Arthur. Mordred is usually a brother or half-brother to Gawain; however, his other family relations, as well as his relationships with Arthur's wife Guinevere, vary greatly.
In a popular telling, originating from the French chivalric romances of the 13th century and made prominent today through its inclusion in Le Morte d'Arthur, Mordred is a power-hungry son of Arthur from the incest with Morgause, prophesied by Merlin and destined to bring Britain to ruin. He survives Arthur's attempt to get rid of him soon after his birth, and, years later, joins his half-brothers Gawain, Agravain, Gaheris and Gareth in Arthur's fellowship of the Round Table as a young knight. Eventually, Mordred learns of his true parentage and becomes the main actor in Arthur's downfall as he helps Agravain to expose the illicit love affair between Guinevere and Lancelot, and then takes advantage of the resulting civil war to make himself the high king of Britain, ultimately leading to both his own and Arthur's deaths in their battle. Today, he remains an iconic character in many modern adaptations of Arthurian legend in which he usually appears as a villain and often as the archenemy of Arthur.
