Segwarides is a Knight of the Round Table in the Arthurian legend. In the Prose Tristan and Sir Thomas Malory's Le Morte d'Arthur, Segwarides is a liegeman of King Mark who is cuckholded by Tristan. Malory also lists an individual of this name as a son of the Saracen king Esclabor; his brothers are Palamedes and Safir. It seems there were originally two characters of this name, but the stories in which they appear fail to differentiate between them.
In Malory, Tristan has a brief affair with Segwarides' wife, and wounds the knight after being found out. Tristan encounters Segwarides later on the Isle of Servage. Segwardies forgives the more famous knight saying he "will never hate a noble knight for a light lady", and the two team up to avoid the dangers of the isle. Soon afterwards Tristan makes Segwarides Lord of Servage.
Sir Segwarides is killed trying to repel Sir Launcelot's rescue of Guinevere from the stake.