Ouranos

Ouranos is the sky, created by Gaea then married to her. They had eighteen children together, the Titans, the Cyclopses and the Hekatonkheires. Ouranos took the Cyclopses and the Hekatonkheires and chained them up in Tartarus because Ouranos had heard a prophecy than one of his sons would overthrow him. The prophecy eventually came true when Kronos chopped Ouranos into tiny pieces and cast him into Tartarus.