Kronos

Kronos (also spelled as Cronus) is the Titan god of Time, Evil, and Harvest. He was the King of the Titans, the most powerful child of Gaea, the brother-husband of Rhea, and the father of the six Elder Olympian gods. Kronos is the main antagonist in Percy Jackson and the Olympians, being directly responsible for some of the major events in the series, such as the Second Titanomachy. His Roman counterpart is Saturn. He is sometimes confused with Chronos.