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His sons were Glaucus, Ornytion, Thersander, and Almus. Sisyphus was as intelligent as his grandfather Prometheus, but he was also cunning and dishonest. He emigrated with his brothers in many myths, and each of them sought to create their own kingdoms. It is possible that the figure of Sisyphus was a real historical figure. However, the real person upon whom the Sisyphean legends are based has been lost in the mists of time.

[[File:Sisyphus Two.jpg|200px|thumb|left|Thanthos Greek God of Death]]

Sisyphus founded, according to some sources, the city of Ephyra, which was the original name of Corinth. However, other sources credit the foundation of the town to another mythological character. Corinth became one of the most important cities in the Hellenic World and later founded many colonies. Sisyphus promoted navigation and trade. Later Corinth was famous for its merchants and ships. Later, some sources created Sisyphus with the growth and prosperity of Corinth.<ref>Graves, Robert. Greek Myths (London, Pelican, 1985), p. 113</ref>