Clytemnestra produced four offspring from two eggs: Castor and Clytemnestra from one egg, and Helen and Polydeuces (Pollux) from the other. Therefore, Castor and Clytemnestra were fathered by Tyndareus, whereas Helen and Polydeuces were fathered by Zeus. Agamemnon and his brother Menelaus were in exile at the home of Tyndareus; in due time Agamemnon married Clytemnestra and Menelaus married Helen. In a late variation, Euripides's "Iphigenia at Aulis", Clytemnestra's first husband was Tantalus, King of Pisa; Agamemnon killed him and Clytemnestra's infant son, then made Clytemnestra his wife. In another version, her first husband was King of Lydia. The kings of
Althaea (mythology) Althaea (mythology) Althaea or Althea (; Ancient Greek: Ἀλθαία "Althaía" "healer" from "althainein", "to cure"; "also a kind of" mallow") was the queen of Calydon in Greek mythology. Althaea was the daughter of King Thestius and Eurythemis, and was sister to Leda, Hypermnestra, Iphiclus, Euippus. She was also the wife of Oeneus, king of Calydon, and mother of sons, Meleager, Toxeus, Thyreus (Pheres or Phereus), Clymenus, Agelaus (Ageleus), Periphas and daughters, Deianeira, Gorge, Melanippe and Eurymede (the latter two were included in the Meleagrids). According to some writers, Meleager was the result of a liaison with the Greek god Ares,