Caliburn. Carnwennan. Carnwennan, or Carnwenhau ("white hilt"), was the dagger of King Arthur in the Welsh Arthurian legends.
It is sometimes attributed with the magical power to shroud its user in shadow. In Culhwch and Olwen Arthur names it as one of the few things in the world which he will not give to Culhwch. Later, he uses it to slay the witch Orddu daughter of Orwen by slicing her in half.[1] In the Welsh Triads, Carnwennan is listed alongside Rhongomiant, Arthur's spear, and Caledfwlch, Arthur's sword, as sacred weapons given to him by God: "the sacred weapons that God had given him: Rhongomiant his spear, Caledfwlch a sword, and Carnwennan his dagger" (Bromwich's translation).[2] Carnwennan is exclusive to the Welsh traditions of Arthur. Clarent. Excalibur. Excalibur is the legendary sword of King Arthur, sometimes attributed with magical powers or associated with the rightful sovereignty of Great Britain.
Sometimes Excalibur and the Sword in the Stone (the proof of Arthur's lineage) are said to be the same weapon, but in most versions they are considered separate. The sword was associated with the Arthurian legend very early. Rhongomiant.