A demon named in both the Grimorium Verum and the Grand Grimoire. He is a martial demon and is described as being Hell's field marshall. The Grand Grimoire also accords him the title of Inspector General of Hell's armies. Nebiros is credited with the ability to work evil upon whomsoever he wishes. He further possesses the secrets of the Hand of Glory, a grisly talisman much sought after by thieves. He knows the virtues of all vegetable, minerals, metals, and animals, and will reveal these to the magician bold enough to summon him forth. Additionally, he has the gift of prophecy, which he typically works through operations of necromancy. Beneath him are the Goetic demons Ipos, Glasya Labolas, and Naberius. The inclusion of Naberius among his ministers is curious,
as Nebiros is almost certainly a variation on the name Naberius.