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")
Castor and Pollux carried the women off to Sparta wherein each had a son; Phoebe bore Mnesileos to Pollux and Hilaeira bore Anogon to Castor. This began a family feud among the four sons of the brothers Tyndareus and Aphareus. The cousins carried out a cattle-raid in Arcadia together but fell out over the division of the meat. After stealing the herd, but before dividing it, the cousins butchered, quartered, and roasted a calf. As they prepared to eat, the gigantic Idas suggested that the herd be divided into two parts instead of four, based on which pair of cousins finished their meal