In demonology, Furcas (also spelled Forcas) is a Knight of Hell (the rank of Knight is unique to him), and rules 20 legions of demons.[1] [2] He teaches Philosophy, Astronomy (Astrology to some authors), Rhetoric, Logic, Chiromancy and Pyromancy. Furcas (also known as Ren Vacca) is depicted as a strong old man with white hair and a long white beard, who rides a horse while holding a sharp weapon (pitch fork).
Notably, the 1563 edition says Forcas is an alias of the demon Foras, but in the 1583 edition of Pseudomonarchia Daemonum, Forcas is established as a unique demon separate from Foras. According to a translation by Joseph H. Peterson:
The etymology of his name may be derived from the Latin word furca, meaning fork,[3] or from Greco-Roman also meaning a sepulchre (tomb).[4]