Is Excalibur and the sword in the stone the same sword?
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. In Welsh, the sword is called Caledfwlch. Geoffrey says the sword was forged in Avalon and Latinizes the name “Caledfwlch” to Caliburn or Caliburnus. When his influential pseudo-history made it to Continental Europe, writers altered the name further until it became Excalibur. The legend was expanded upon in the Vulgate Cycle, also known as the Lancelot-Grail Cycle, and in the Post-Vulgate Cycle which emerged in its wake Excalibur’s blade was engraved with words on opposite sides. On one side were the words “take me up”, and on the other side “cast me away” (or similar words). This prefigures its return into the water.