In demonology, Forneus is a Great Marquis of Hell, and has twenty-nine legions of demons under his rule.
He teaches Rhetoric and languages, gives men a good name, and makes them be loved by their friends and foes.
He is depicted as a great sea monster.
He causes men to have a good name and to have the knowledge and understanding of tongues.
He makes one beloved by his foes as well as of his friends.