Titans

Summary
In classical Greek mythology, the Titans and Titanesses were members of the second order of gods and goddesses, descended from the primordial gods and goddesses and ancestors of the Olympians. The Titans lived on Mount Othrys, and were the first twelve children of Gaia and Uranus. They were giants possessing incredible strength, who ruled the legendary Golden Age, and also composed the first pantheon of Greek gods and goddesses. The first generation goddesses were: The first generation gods were: The second generation of Titans consisted of Hyperion's children Helios, Selene, and Eos; Coeus' children Lelantos, Leto, and Asteria; Iapetus' sons Atlas, Prometheus, Epimetheus and Menoetius; Oceanus' daughter Metis; and Cirus' sons Astraeus, Pallas, and Perses.
 * 1) Mnemosyne
 * 2) Tethys
 * 3) Theia
 * 4) Phoebe
 * 5) Rhea
 * 6) Themis
 * 1) Oceanus
 * 2) Hyperion
 * 3) Coeus
 * 4) Cronus
 * 5) Crius
 * 6) Iapetus

As they had once overthrown the primordial gods and goddesses, the Titans were in turn overthrown by younger gods and goddesses, including some of their own children. The new pantheon was known as the Olympians.