Leda was the daughter of Thestius, King of Aetolia, who became the wife of Tyndareüs, king of Sparta and the mother of the Dioscuri (Castor and Pollux) and Helen. She is usually associated with the fact that Zeus visited her disguised as a swan and coupled with her. Her name is said to mean 'lady', not from the English word but from a Lycian (i.e. Cretan) word, and to be related to Leto (or Latona). (Although Leto's name, which see, could mean 'darkness', in which case Leda's husband's name, Tyndareüs, could be complementary, since it means 'light'.)