Kronos

Kronos or Cronus (both: krō`nəs), in Greek religion and mythology, the youngest Titan, son of Uranus and Gaea. With the help of his mother, he led the Titans in the revolt against Uranus and ruled the world. He married his sister Rhea and fathered the great gods—Zeus, Poseidon, Demeter, Hera, Hades, and Hestia. Because he was fated to be overthrown by one of his children, he swallowed them all as infants until Rhea hid Zeus and presented Kronos with a stone wrapped in a blanket, which he ate. Later Zeus tricked him into disgorging his children. Zeus then led the Olympian gods in overthrowing Kronos in the battle called the Titanomachy, described by Hesiod. Kronos and all the defeated Titans, except Atlas, were exiled. Kronos is equated with the Roman Saturn and was probably a god of a pre-Hellenic people.

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Cronus

 or Cronos or Kronos

In Greek religion, a male agricultural deity. He was the youngest of the 12 Titans borne by Uranus and Gaea, and his castration of his father separated heaven from earth. With his sister and consort Rhea, he fathered Hestia, Demeter, Hera, Hades, and Poseidon, all of whom he swallowed because he had been warned that he would be overthrown by his own child. Rhea hid his son Zeus and tricked Cronus into swallowing a stone; Zeus later forced Cronus to disgorge the others and then vanquished him in war. He was identified with the Roman god Saturn.