Thetis is a figure from Greek mythology with varying mythological roles. She mainly appears as a sea nymph, a goddess of water, and one of the 50 Nereids, daughters of the ancient sea god Nereus.
Statue of Thetis with a young Triton, Roman copy
Immortal Thetis with the mortal Peleus in the foreground, Boeotian black-figure dish, c. 500–475 BC - Louvre
Thetis changing into a lioness as she is attacked by Peleus, Attic red-figured kylix by Douris, c. 490 BC from Vulci, Etruria - Bibliothèque nationale de France in Paris
Thetis dips Achilles in the Styx by Peter Paul Rubens (between 1630 and 1635)
In Greek mythology, Nereus was the eldest son of Pontus and Gaia. Nereus and Doris became the parents of 50 daughters and a son, with whom Nereus lived in the Aegean Sea.
Thetis
…with varying mythological roles. She mainly appears as a sea nymph, a goddess of water, and one of the 50 Nereids, daughters of the ancient sea god Nereus. When described as a Nereid in Classical myths, Thetis was the daughter of Nereus and Doris, and a granddaughter of Tethys with whom she sometimes…
Nereus in a frieze of the Pergamon Altar (Berlin).