Oceanus was a divine figure in classical antiquity, believed by the ancient Greeks and Romans to be the divine personification of the ocean which the ancient Greeks perceived as an enormous riverencircling the world.
Hera is the goddess of women, marriage, family, and childbirth in ancient Greek religion and myth, one of the Twelve Olympians and the sister-wife of Zeus. She is the daughter of the TitansCronus and Rhea. Hera rules over Mount Olympus as queen of the gods. A matronly figure, Hera served as both the patroness and protectress of married women, presiding over weddings and blessing marital unions. One of Hera's defining characteristics is her jealous and vengeful nature against Zeus' numerous lovers and illegitimate offspring, as well as the mortals who cross her.
Tethys played no active part in Greek mythology. The only early story concerning Tethys is what Homer has Hera briefly relate in the Iliad’s Deception of Zeus passage. There, Hera says that when Zeus was in the process of deposing Cronus, she was given by her mother Rhea to Tethys and Oceanus for safekeeping and that they "lovingly nursed and cherished me in their halls". Hera relates this while dissembling that she is on her way to visit Oceanus and Tethys in the hopes of reconciling her foster parents who are angry with each other and are no longer having sexual relations.
Originally Oceanus' consort, at a later time Tethys came to be identified with the sea and in Hellenistic and Roman poetry Tethys' name came to be used as a poetic term for the sea.