Origins of Merlin

Merlin made his first appearance in literature during the twelfth
century A.D. in Prophecies of Merlin by Geoffrey of Monmouth.
Geoffrey based Merlin from a Welsh legend describing a sixth century
northern bard named Myrddin, who was said to have prophetic powers
and was apparently slightly mad. Geoffrey, who Latinized the name
Myrddin, found it necessary to make additional modifications to the
Latinized name to avoid confusion with a similarly sounding obscene
French word. Geoffrey therefore settled on the name Merlinus.
The Myrddin from the Welsh tradition stems from a legend
dealing with St. Kentigern, the patron saint of Glasgow. Myrddin, who is called Lailoken
in this legend, helps start the battle at Arthuret, which occurred around 575 A.D. The conflict
ends with tragic consequences, and because of his part, Lailoken was driven
mad and cursed with prophetic powers.