Daemon is also how it's spelled in Mary Shelley's Frankenstein. I always wondered if there was some connection to its use in computing. She uses that spelling of the word to imply that the "monster" is not evil. I can't find a good source, but there are plenty of things which have similar jists to this: "A daemon was originally a spirit somewhere between gods and men. Later, with the spelling ‘demon', it acquired the meaning of a devil or evil spirit."
