found: Wikipedia, December 9, 2014(In Greek mythology, Leda was daughter of the Aetolian king Thestius, and wife of king Tyndareus of Sparta. Her myth gave rise to the popular motif in Renaissance and later art of Leda and the Swan. Leda was admired by Zeus, who seduced her in the guise of a swan. As a swan, Zeus fell into her arms for protection from a pursuing eagle. Their consummation, on the same night as Leda lay with her husband Tyndareus, resulted in two eggs from which hatched Helen (later known as the beautiful "Helen of Troy"), Clytemnestra, and Castor and Pollux (also known as the Dioscuri)).
