Mordred (Goa'uld)

Mordred is a Goa'uld and is one of Manannan mac LirLir's the word. When Macalester St. John was sent on a mission to the planet Longinus. disguised himself as a butler known as Peter Doyle, who had donated to the observation dome of Mordred. (RPG: "Stargate SG-1: First Steps: The Stargate Unexplored Worlds Roleplaying Sourcebook")