In Greek mythology, Ixion ( ; , gen.: Ἰξίωνος) was king of the Lapiths, the most ancient tribe of Thessaly, and a son of Ares, or Leonteus, or Antion and Perimele, or the notorious evildoer Phlegyas, whose name connotes "fiery". Peirithoös was his son (or stepson, if Zeus were his father, as the sky-god claims to Hera in Iliad 14).