Titans

In the Greek pantheon, the Titans are the twelve children (six sons and six daughters) of Gaia and Uranus. Each son married, or had children with, one of his sisters. They are: Kronus and Rhea, Iapetus and Themis, Oceanus and Tethys, Hyperion and Theia, Crius and Mnemosyne, and Coeus and Phoebe.