Orcus

Orcus (also known as Jusjurandum, anglicised as Lord Oath) was demonic god of the Hadao in Italic and Roman mythology, having a role similar to Hades. He was venerated by the Etruscan and Latin peoples of pre-Roman Italy as the lord of the Underworld and punisher of oathbreakers.

Video games

 * Orcus appears in Kid Icarus: Of Myth and Monsters. In the game, his name is spelled Orcos, and he is a demon warlord that belongs to the Underworld rather than a god.