Demonic, Hellish, Satanic and Devilish Hierarchy - I
[F] = Female
Iblis
A devil.
Ifrits
Evil, hideous spectres. Became Genies in Persian and Indian mythology. Also associated with Jinns and Divs of Persia. (Arabic)
Incubus | Inncubus, Inccubus
A male spirit or devil who in the shape of a man is sleeping with a woman. In female shape, succuba, the devil is seducing men. Its name derives from the Latin incubare, meaning to lie upon, in, or with, because an incubus lies with a mortal woman in ghostly sexual intercourse. The woman does not awaken during the peculiar embrace although she may experience it in a dream.
A woman impregnated by an incubus becomes pregnant in the normal way, and eventually gives birth to a child of supernatural capabilities. Possibly it will grow into a person of evil intent or possibly, like the magician Merlin, in the tales around King Arthur who was born of the union between an incubus and a nun, it will become a powerful wizard of strongly moral character. Books about witch-craft from the 16th century often mentions incubus, while succuba is rare. [Plural: incubi]
Inferno
The home of the doomed in the Christian imagination. Hell. [More]
Ipes | Aypeos, Ayporus, Ipos
A mighty earl and prince, appearing as an angel with a lion's head, the webbed feet of a goose and a hare's tail. He knows the past and future, and imparts wit and courage.
Ishtar
Babylonian goddess of fertility.