Caliburn is the sword in the stone, Excalibur is the sword of the lake. Excalibur was pulled out of a lake. Lakes are wet.
I know exactly where I am going with this and so do you
Caliburn & Excalibur were the same sword(Caledfwlch in Welsh, Caliburnus in Latin, and Excalibur im English) until the French got involved, and made them two separate swords.