Medea (meh-DEE-uh or mee-DEE-uh). Medea, daughter of King Aeetes, was a famous sorceress. It was Medea who enabled Jason and the Argonauts to claim the Golden Fleece from the sacred grove in which it hung. She had already helped Jason survive various perilous tasks set him by her father, and now she enchanted the dragon which guarded the Fleece so that Jason could make off with it. Later she married King Aegeus of Athens and tried to poison his son Theseus. Another picture.