In the Matter of Britain, Sir Bedivere (/ˈbɛdᵻvɪər/ or /ˈbiːdᵻvɪər/; Welsh: Bedwyr; French: Bédoier, also spelt Bedevere) is the Knight of the Round Table of King Arthur who returns Excalibur to the Lady of the Lake. He serves as Arthur's marshal and is frequently associated with Sir Kay. Sir Lucan is his brother and Griflet is his cousin.
Bedivere is one of the earliest characters to be associated with the Matter of Britain, appearing in a number of early Welsh texts in which he is described as Bedwyr Bedrydant ("Bedwyr of the Perfect Sinews"), a handsome, one-handed knight under Arthur's command. His father is given as Pedrawd or Bedrawd, and his children as Amhren and Eneuawg, both members of Arthur's court.
One of the earliest direct references to Bedwyr can be found in the 10th century poem Pa Gur which recounts the exploits of a number of Arthur's knights, including Bedwyr, Cei and Manawydan. Of Bedwyr, the narrative says:
A 9th-century version of Englynion y Beddau ("The Stanzas of the Graves") gives Bedwyr's final resting place on Tryfan. In the c.110 hagiography of Cadoc, Bedwyr is alongside Arthur and Cei (Kay) in dealing with King Gwynllyw of Gwynllwg's abduction of Gwladys from her father's court in Brycheiniog. A possible allusion to Bedwyr could be found in the reference to Bedwyr's well in the 9th century Marwnad Cadwallon ap Cadfan. The Welsh Triads name Bedwyr as "Battle-Diademed", and a superior to Drystan, Hueil mab Caw and even Cei.