Diopos is a demon in Mathers’ translation of the Sacred Magic of Abramelin the Mage. His name is said to be derived from Greek meaning “overseer.” He is a servant of the arch-fiends Asmodeus and Magoth. A.G.H.
Belanger, Michelle. The Dictionary of Demon: Names of the Damneds. Llewellen Publications. 2010. ebook.