In demonology, Amaymon is a prince of Hell, and, according to some grimoires, the only one who has power over Asmodai. A curious characteristic of this spirit is alleged in almost all copies of the Ars Goetia in English, that during the evocation of Asmodai to visible appearance, the exorcist must stand upright with his cap or headdress removed in a show of respect, because if he does not do so, then Amaymon will deceive him and doom all of his work.