Castor and Pollux Castor and Pollux Castor and Pollux (or in Greek, Polydeuces) were twin half-brothers in Greek and Roman mythology, known together as the Dioscuri. Their mother was Leda, but they had different fathers; Castor was the mortal son of Tyndareus, the king of Sparta, while Pollux was the divine son of Zeus, who seduced Leda in the guise of a swan. Though accounts of their birth are varied, they are sometimes said to have been born from an egg, along with their twin sisters Helen of Troy and Clytemnestra. In Latin the twins are also known as the Gemini (literally "twins")
Leda (mythology) by creating the constellation Cygnus (Κύκνος), the Swan, in the sky. Leda and the swan and Leda and the egg were popular subjects in ancient art. In the post-classical arts, it became a potent source of inspiration. It is the subject of William Butler Yeats' poem Leda and the Swan. She is also the main subject in Honoré Desmond Sharrer's "Leda & the Folks", a large painting focusing as well on the parents of entertainer Elvis Presley and currently located at the Smith College Museum of Art. Leda (mythology) In Greek mythology, Leda (; Ancient Greek: Λήδα ) was an