Tethys (pronounced TEE-thus) is the Greek Goddess of the ocean. She is one of the Titans, daughter of Gaia and Uranus, and sister-wife to another Titan, Oceanus, God of the ocean. With Oceanus, Tethys is the mother of the Oceanids (deities of springs and streams), the Potamoi (deities of rivers), and the Nephelai (deities of the clouds). In total, she had over 3000 children, including Acaste, Admete, Aethra, Amaltheia, Amphitrite, Argia, Asia, Ceto, Chryseis, Clytie, Daira, Doris, Eudore, Ianira, Leucippe, Lysithea, Meliboea, Metis, Peitho, Perseis, Pleione, Rhode, Styx, Telesto, and Tyche. Tethys’s name means “grandmother.”