Tyndareus is the king of Sparta and Helen’s father. When Helen is ready to marry, he summons a group of suitors to woo her—but he ends up taking Odysseus’s advice to allow Helen to choose her own husband and to force her other suitors to vow that they’ll defend the selected man. Odysseus eventually marries Tyndareus’s other daughter, Penelope, and Tyndareus finds him amusing. However, he doesn’t trust Odysseus’s charm completely and forces him to swear the oath as well.