Merlin 

A magician.

Merlin is said to have put Igerna and/or Uther Pendragou under a spell so that Pendragon could rape Igerna to produce an illegitimate son later known as King Arthur. (See "The Second Messiah" p 103)

Merlin was also the name of the Rolls Royce airplane engine that powered the famous P-51 Mustang of WW2.