Caladbolg derives its name from an ancient Welsh sword wielded by
Macsen Wledig. And it is known that Caladbolg was another name for the famed sword Excalibur used by King Arthur.
The meaning of the name Caladbolg is "Hard-Lightning" or "Lightning-Shard" calad-hard, bolg-lightning. The sword is said to have been able to cut an entire hill in half with
one fell swoop. It was an Irish sword that was believed to be similar to King
Arthur's Excalabar