In demonology, Forneus is a Great Marquis of Hell.
Forneus' name seems to come from Latin 'fornus', 'furnus', oven.
Forneus is a Great Marquis of Hell and has twenty-nine legions of demons under his command.
Forneus is depicted as a sea-monster.
Forneus teaches Rhetoric and languages, gives men a good name, and makes them be loved by their friends and foes.
Forneus is a great marquesse, like unto a monster of the sea, he maketh men woondeffull in rhetorike, he adorneth a man with a good name, and the knowledge of toongs, and maketh one beloved as well of foes as freends: there are under him nine and twentie legions, of the order partlie of thrones, and partlie of angels. Pseudomonarchia daemonum - Johann Wier (1583)
The Thirtieth Spirit is Forneus. He is a Mighty and Great Marquis, and appeareth in the Form of a Great Sea-Monster. He teacheth, and maketh men wonderfully knowing in the Art of Rhetoric. He beloved of his Foes as well as of his Friends. He governeth 29 Legions of Spirits, partly of the Order of Thrones, and partly of that of Angels. His Seal is this, which wear thou, etc. Goetia - S. L. MacGregor Mathers (1904)
- In Shin Megami Tensei III: Nocturne, Forneus is a boss that appears like a large stingray with a crown atop of his head.
- In Ace Combat X for the PSP, there is an obtainable aircraft called the YR-99 Forneus.
- In AquaNox, Forneus is a gigantic squid-like creature who leads the armies of "The Old Ones". He is also known to have eaten another arch-villain, Mad Sam Korhonen.
- Forneus appears with Andras in Castlevania's Portrait of Ruin near the beginning of the game as a large, jellyfish-like monster. It is described as a demonic sea creature from oceans of the underworld.
- Forneus was one of the Abyss gate guardians in the Super Famicom RPG, Romancing SaGa 3.
- Forneus appears in Tales of Destiny 2 as a boss who attacks a ferry.
- Forneus is also the name belonging to an Australian ambient solo project. Link: www.myspace.com/forneusproject
- Forneus is the main servant of Adilisia Lenn Mathers in the anime Rental Magica.