Tethys
Tethys, the smallest child of the celestial Uranus and the earthly Gaia, was associated with nursing and freshwater. Oceanus, his brother, was her husband. She had numerous offspring who later rose to prominence as minor deities and gods. The Oceanids, a group of 3000 sea nymphs, Metis, Zeus's first wife, Electra, the mother of Iris, the rainbow goddess, and finally the Harpies were also present. It was thought that she was the source of all pure water.
Rhea sent Zeus to Tethys to be kept secure after she delivered him from Cronus, his father. Zeus was cared for by Tethys until he came back to exact retribution on Cronus. Even though she was not Zeus' biological mother, she nurtured him as one and protected him from harm.
Tethys and Oceanus, in contrast to many of the other Titans, were not involved in the overthrow of Uranus, the Titanomachy, or the overthrow of Cronus. She and her spouse so continued to play the roles of goddesses throughout time. She took care of all the aquatic animals, including fish, dolphins, and other monsters and creatures of the deep.
Goddess of: Nursing, Freshwater, the rivers
Children: The Potamoi, Oceanids, and the Harpies