In Greek mythology, Cronos was the youngest of the Titans, the 12 children of Ouranos (Heaven) and Gaia
(Earth). Cronos became supreme ruler by killing his father. He then
married his sister Rhea.
As soon as Rhea bore children, Cronos swallowed them, lest they
usurp his power. In this way he temporarily disposed of Hestia, Demeter,
Hera, Hades, and
Poseidon. When the sixth child, Zeus, was born, Rhea hid him and gave Cronos a stone
wrapped in swaddling clothes to swallow. After Zeus grew to
manhood, he returned to his father and gave him an emetic, causing
Cronos to regurgitate all the children he had swallowed. A 10-year
struggle followed between the children of Cronos, led by Zeus, and
the Titans, led by Cronos. Eventually the Titans were defeated, and
Cronos was exiled. The poet Hesiod tells the story of Cronos in the
Theogony and the Works and Days. Later, the old Roman agrarian god
Saturn became identified with Cronos.