Sagremor

Sir Sagramore (or Sagremor) is a Knight of the Round Table in the Arthurian legend. His characterization varies from story to story, though he is surprisingly prolific; he appears in a number of early stories, such as Chrétien de Troyes' works, and he turns up in all the cyclical versions. He gains a number of nicknames, including "The Impetuous."
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[Arthurian] A Knight of the Round Table. In the Vulgate Cycle he is slain by Mordred in the battle between Mordred and Arthur. The Vulgate also mentions Sagremor as the nephew of the Emperor of Constantinople and that he has an illness that attacks him without warning, causing Kay to call him 'le mort jeune' ("the young corpse"). In the prose Tristan, he is Tristan's messenger who brings his sword and sword when Tristan is dying. He is furthermore mentioned in Chrétien de Troyes Perceval, Froissart's Meliador, and Tennyson's Idylls of the King.