Cronus or Kronos, (Greek: Κρόνος), was a Titan. The Titans were the last children born of Gaia (Goddess of the Earth) and uranos (God of the sky).
According to the tale, Gaia was angry because Uranos had imprisoned some of their eldest children in Earth's own depths. For this reason, she asked her remaining children to destroy uranos.
Cronos was the only one of her children brave enough to take action against him. he lay in wait for his father, and when he wounded him gravely, the Giants and the Furies materialized from Oranos' spilled blood.
After driving his father away, Kronos became king of the universe. He remained so for eons, alongside his sister and queen, Rhea. At one point, Kronos learned that one of his children was to succeed him just as he had succeeded his own father. Kronos prevented it by swallowing each of his children the day they were born. But when Rhea bore her sixth child, named Zeus, she had him secretly transported to Crete.
Rhea wrapped a stone in baby's clothes, and handed it to Kronos who promptly swallowed it. Later Kronos threw up the children that he ate and then there was a 10 year war against Kronos and the other Titans. The gods eventually won and overthrew the Titans. Zeus then cut up his father Kronos and threw him into Tartarus.
His Roman equivalent is Saturn.