In Greek Mythology, mentioned that Ixion is son from God of War, Ares. In every myth stories he appear as a bad person with his various bad attitude. He married with Dia, and in one of the story he trapped Dia's father because denied to give him a kind of money and riches. He take his Dia's father into "Eiones" which is some kind of hole with fire surrounding it. He must be have hard punishment from Zeus but Zeus forgive him because actually Zeus fall in love with Dia, Ixion's wife.
But after dare to disturb Hera (Zeus's wife) Zeus finally give him a punishment which is placed him in Tartarus (Deepground-Hell). In Final Fantasy series Ixion appear as on of powerful Aeon in Final Fantasy X also become one of the greatest Esper in Final Fantasy XII .