Yes, the character Crowley from the book and TV adaptation of Good Omens is indeed named after the infamous occultist Aleister Crowley. Neil Gaiman and Terry Pratchett, the authors of Good Omens, have acknowledged that the character’s name pays homage to Crowley, who was a controversial figure in the early 20th century known for his writings on magic and esotericism.
This connection is reflected in the character’s personality and attributes. Crowley in Good Omens is a charming and somewhat rebellious demon who enjoys the pleasures of life on Earth, embodying many of the libertine and unconventional aspects associated with Aleister Crowley himself. The playful nod to such an influential figure adds depth to the character and imbues the narrative with an undertone of satire regarding good, evil, and everything in between.