In Greek mythology, Enceladus was one of the Giants, the offspring of Gaia and Uranus. Enceladus was the traditional opponent of Athena during the Gigantomachy, the war between the Giants and the gods
Athena (left) fighting Enceladus (inscribed retrograde) on an Attic red-figure dish, c. 530 BC (Louvre CA3662)
In Greek mythology, Alcyoneus or Alkyoneus was a traditional opponent of the hero Heracles. He was usually considered to be one of the Gigantes, the offspring of Gaia born from the blood of the castra
Alcyoneus (?), Athena, Gaia, and Nike, detail of the Gigantomachy frieze, Pergamon Altar, Pergamon museum, Berlin.