Kronos (mythology)

Mythology
According to Greek Mythology, Cronus (aka Kronos, or Saturn in Rome) was the youngest of the Titans, the twelve children of Gaia (the earth) and Ouranos (the sky). As the story goes, Gaia was upset that Ouranos cast her children, the cyclopes and the Hundred-handed ones into the pit Tartarus, so she commanded her children to take the Bronze Scythe and kill Ouranos and set them free. Cronus took it, castrated and killed his father, took over, but didn't free the cyclopes or hundred-handed ones. Cronus knew one of his children would be his downfall, so whenever one of his children was born, he would swallow it. Gaia planned his downfall and told Cronus's wife, Rhea, to decoy Cronus with a stone and take the baby, who was Zeus, and hide him.

As the story goes, Zeus grows up, creates a drink that forces Cronus to vomit up his older siblings, frees the cyclopes and hundred-hand ones from tartarus, and engages Cronus and the other Titans in the Titan War. Zeus and his allies win, and Zeus chops Cronus with the Bronze Scythe and casts him into Tartarus.

Percy Jackson Series
In the Percy Jackson and the Olympians series, Cronus is trying to revive himself and take revenge on the other gods.