Aleister Crowley
From Tardis Wiki, the free Doctor Who reference
Aleister Crowley (1875-1947) was a British occultist and mystic.
At some point prior to 1915, Crowley gave his copy of the Necronomicon to Dr. Howard Phillips in lieu of payment for an ulcer operation. (NA: White Darkness)
In 1947, a Jarakabeth that Crowley had summoned began impersonating him after his death. (PDA: Heart of TARDIS)
A Reprise of Crowley lived in Europa and was a rival of Johann Faust. (MA: Managra)