King Tyndareus

Tyrandeus is the King of Sparta and holds huge tracts of the ripest southern lands.

Family
Zeus had raped Leda, while disguised as a swan. She gave birth to two sets of twins: Clytemnestra & Castor, of Tyndareus and Helen & Polydeuces, of Zeus. Because the gods were known to be poor parents, it was expected for Tyndareus to parent all of the children.

Helen

 * When Helen comes of age, kings come to compete for her hand. Odysseus suggests a blood oath so that the suitors do not turn on Tyndareus or Helen's new husband after Helen herself chooses her husband. In return for this, Tyndareus gives Odysseus his niece Penelope's hand in marriage.