Rhea is the partner of Cronus and the mother of Zeus. Along with Cronus she was the offspring of Gaea the earth and Uranus the heavens and they were Titans of the Earth.

Rhea

Rhea is the partner of Cronus and the mother of Zeus. Along with Cronus she was the offspring of Gaea the earth and Uranus the heavens and they were Titans of the Earth.

All data from the awesome folks at Marvel.