Gareth was one of the Knights of the Round Table in King Arthur's Court. In Sir Thomas Mallory's classic story, Le Morte D'Arthur ( French for "the death of Arthur"), Gareth is given the nickname of "Beaumains" by Sir Kay. After one year, Gareth revealed his identity as Sir Gawain's brother and went on a quest as a gift from Arthur.
↑Norris J. Lacy, ed. and trans., Lancelot-Grail: The Death of Arthur, Volume 7 of Lancelot-Grail: The Old French Arthurian Vulgate and Post-Vulgate in Translation, Boydell & Brewer Ltd, 2010, p. 69. ISBN9780859917704.