In Jewish demonology, Belphegor is the Arch-devil. In qabalah, Belphegor is a demon who helps people make discoveries. He seduces people by suggesting to them ingenious inventions that will make them rich, stagnating that which could not be accredited to itself.

There have been various attempts at the classification of demons within the contexts of classical mythology, demonology, occultism, and Renaissance magic. These classifications may be for purposes of traditional medicine, exorcisms, ceremonial magic, witch-hunts, lessons in morality, folklore, religious ritual, or combinations thereof. Classifications might be according to astrological connections, elemental forms, noble titles, or parallels to the angelic hierarchy; or by association with particular sins, diseases, and other calamities; or by what angel or saint opposes them.