Kratos is a minor Ancient Greek god or demon. His name comes from the Greek word for "power" or "strength". He was a guardian of the throne of Zeus. Kratos was the second son of Zeus and also the brother of Nike, Zelus, and Bia. He was one of the few people who dragged Prometheus to the rock where he was chained. His name is used as part of other words about power, including democracy, theocracy, plutocracy, aristocracy and dictator.