Tethys ~ Rhea ~ Theia

Thetys is the Titaness of fresh-water, and the mother of the rivers, springs, streams, fountains, and clouds. She was a daughter of Uranus and Gaia, and the wife of her brother Titan Oceanus, and the mother by him of the river gods and the Oceanids.

Rhea is the Titaness daughter of the earth goddess Gaia and the sky god Uranus, in Greek mythology and sister and wife to Cronus. In early traditions, she is known as "the mother of gods" and therefore is strongly associated with Gaia and Cybele, who have similar functions. The classical Greeks saw her as the mother of the Olympian goddesses and gods, but not as an Olympian goddess in her own right. The Romans identified her with Magna Mater (their form of Cybele), and the Goddess Ops.

Theia is the Titaness of sight and the shining light of the clear blue sky. Her brother/consort is Hyperion, a Titan and god of the sun, and together they are the parents of Helios (the Sun), Selene (the Moon), and Eos (the Dawn).