The son of Gaia (Mother Earth) and Ouranos (Father Sky), he was the youngest of his brothers. At the urging of Gaia, Kronos castrated his father, Ouranos, with a sickle and overthrew him, ruling the cosmos as king during the so-called Golden Age. Kronos married his sister Rhea, and sired the first generation of the Olympian gods: Hestia, Demeter, Hera, Hades, Poseidon, and Zeus.