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.
Soulcalibur
The "Soul" series features a wide variety of characters hailing from various regions, backgrounds, and disciplines. Most characters typically have their own reasons in partaking their journey, although they frequently meet and interact with each other and most also share a common goal; finding either the cursed sword Soul Edge or its holy counterpart, Soul Calibur. As the game is set in the late 16th century, many real-life events happening during the timeline often influence the story, one example being Oda Nobunaga as the initiator for Yoshimitsu's journey to find Soul Edge.