Apolin: A demon named in the fifteenth-century Munich Handbook. He is reputed to be an infernal instructor with the power to teach on any subject. He is called upon in a spell for increasing knowledge, where he is said to appear at night in dreams to impart everything he knows. The name of this demon is very likely derived from Apollo, the Greek
god of music, healing, prophecy, and the sun.
Source : Dictionary of Demons by Michelle Belanger
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