köken: From incubō (“to lie upon, brood over, be a burden to”, verb) + -us (second-declension nominalizing suffix). An alternative formation to third-declension Classical incubō, incubōnis (“incubus, nightmare”, noun).
...Siluanos et Panes, quos uulgo incubos uocant, inprobos saepe extitisse mulieribus et earum appetisse ac peregisse concubitum;
Pilosi, qui Graece Panitae, Latine Incubi appellantur, sive Inui ab ineundo passim cum animalibus.