Titans (mythology) – Wikipedia

The Titans were the former gods, the generation of gods preceding the Olympians. They were overthrown as part of the Greek succession myth, which told how Cronus seized power from his father Uranus, and ruled the cosmos with the Titans as his subordinates, and how Cronus and the Titans were in turn defeated and replaced as the ruling pantheon …

https://en.wikipedia.org/wiki/Titan_(mythology)