The main demonic character in the humouristic-apocalyptic story Good Omens by Pratchett and Gaiman goes by the name Anthony Crowley - a name which instantly jumped out at me because of its similarity to the famous English occultist and magician Aleister Crowley.
Ordinarily I would have dismissed it as a coincidence, since the surname Crowley isn't too uncommon, and in the context of Good Omens it even has a fictional etymology, being derived from "Crawly" the serpent in the Garden of Eden. But given the context - a book which talks a great deal about the occult and contains a great many British cultural references - I have to wonder if it is a deliberate reference.
What evidence is there that Crowley's name was chosen to refer to Aleister Crowley?
Evidence might take the form of e.g. quotes from the authors, comparisons with other things in the text, or any other reasonable course of deduction.