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.
List of Soulcalibur characters
The "Soulcalibur" series is a weapon-based fighting game franchise developed by Namco Bandai's Project Soul division. Set in the period of late 16th to early 17th century, the plot of the games revolve around Soul Edge, a cursed sword able to possess its wielder and devour souls. Its spirit is called Inferno, and his avatar/host is called Nightmare. Soul Calibur, a holy sword and Soul Edge's antithesis, also has a spirit called Elysium.