in many godly and heroic offspring, including Athena , Apollo and Artemis , Hermes , Persephone (by Demeter ), Dionysus , Perseus , Heracles , Helen of Troy , Minos , and the Muses (by Mnemosyne ); by Hera, he is usually said to have fathered Ares , Hebe and a title="Hephaestus" href="http://en.wikipedia.org/wiki/Hephaestus">