In Greek mythology, Aeson was a king of Iolcus in Thessaly. He was the father of the hero Jason. According to one version of the story, he was imprisoned by his half-brother Pelias, and when Pelias intended to kill him he committed suicide. In another story, he was killed by Jason's wife Medea, who brought him back to life as a young man.

Pelias was king of Iolcus in Greek mythology. He was the one who sent Jason on the quest for the Golden Fleece.