Oceanus was an ancient Greek god. According to one version, he was born by the union of the primal gods Chaos and Gaea, sanctified by god Eros. Another version has it that he was one of the twelve Titans, thus a son of Gaea and Uranus. Oceanus was married to his sister, Tethys, with whom he had numerous children, called Oceanids. These were the lesser gods and goddesses of the rivers, the sea, and the springs.