Board Thread:Speculation House/@comment-2606:A000:A712:8900:2DA4:2C54:6D4D:389A-20171204011733/@comment-26397825-20171204012530

He doesn't carry Excalibur at all. His sword is named Crocea Mors, which is Julius Caesar's sword. A British prince did aquire it for a short period of time, but that was Nennius and the sword was buried with him when he died 50 days after fighting Julius Caesar and gaining the sword.

Also, just because someone uses a sword in World of Remnant doesn't mean it's a sword we've seen in the modern day or Remnant. Jaune's sword and Ozking's sword (since the King of Vale has been confirmed to be a previous form of Ozpin's) are completely different.