Excalibur
Geoffrey of Monmouth, in his "Historia Regum Britanniae" ("The History of the Kings of Britain", c. 1136), Latinised the name of Arthur's sword as "Caliburnus" (potentially influenced by the Medieval Latin spelling "calibs" of Classical Latin "chalybs", from Greek "chályps" ["χάλυψ"] "steel"). Most Celticists consider Geoffrey's "Caliburnus" to be derivative of a lost Old Welsh text in which "bwlch" (Old Welsh "bulc[h]") had not yet been lenited to "fwlch" (Middle Welsh "vwlch" or "uwlch"). In the late 15th/early 16th-century Middle Cornish play "Beunans Ke", Arthur's sword is called "Calesvol", which is etymologically an exact Middle Cornish cognate of the Welsh "Caledfwlch". It is unclear if the name was borrowed from the Welsh (if so, it must have been an early loan, for phonological reasons), or represents an early, pan-Brittonic traditional name for Arthur's sword.
Hellboy: The Wild Hunt
Hellboy finds Alice's charred remains in her sickroom, where Vasilisa appears to Hellboy to ask him why he didn't take Excalibur. Hellboy explains that he does not trust Morgan le Fay and that, in light of the bloodlust he showed wielding a sword against the giants, he fears what he would do if he took Excalibur. She argues that rather than trusting what he's been told of his world-destroying destiny, he should trust Alice's faith in him and her desire for him to take the sword. He goes back to the sword, and - watched by Vasilisa and Astaroth, and from afar also by Queen Mab and Dagda's old servant, Sir Edward Grey and the witch doctor Mohlomi, the Baba Yaga and her servant Koku, and three witches watching scrying in their cauldron - he pulls the sword easily from the stone, saying "Son of a ..." and suddenly finds himself beside a still-living Alice out on the hillside where they had met Mab, dressed as if nothing had transpired since, save that Hellboy is holding the sword. They embrace, and in her castle Morgan le Fay notes the event while reviewing a chessboard populated by white and black skeletons and one red king. The Gruagach begs Nimue to empower him as promised, but when he ventures that she lacks the power to do so she becomes enraged at his lack of faith and banishes him from her service to wander off in tears. Hellboy and Alice wander down the hill musing over Hellboy's newfound kingship, as Lady Hatton of the Osiris club observes them in her scrying glass. When the club's newer members begin to panic over Hellboy's accession to kingship, they are killed by the club's original seven members who explain that they have been waiting for Hellboy's kingship since 1866 when the spirit Larzod, also inspiration of long-time Hellboy adversaries the Heliopic Brotherhood of Ra, had appeared to them and granted them immortality with which to await Hellboy's death in final battle, cutting off and seizing his world-controlling stone right hand. The craftsman-ambassador from Jutland, having murdered his king for the heart he has extracted to burn as fuel, tearfully holds up the helmet he has forged for Nimue, in the form of a trio of ravens.