In demonology, Gusion (Gusayn, Gusoin, Gusoyn) is a strong Great Duke of Hell, and rules over forty legions of demons. He is depicted as a baboon or according to some, in the form of a Cynocephalus (Dog Headed). He tells all past, present and future things, shows the meaning of all questions that are asked to him, reconciles friends, and gives honor and dignity.