Aeolus was the king of Aeolia or Iolcus in Thessaly. For some reason, Zeus gave him charge over the winds, which Aeolus kept in a cave. He is seen in the Odyssey, the Argonautica and the Aeneid.
Aeolus had several sons, among whom was Athamas, the king of Boeotia, and Cretheus. Cretheus had a son named Aeson, father of Jason, and he also adopted Pelias and Neleus, who were the twins of his wife and Poseidon. It was Pelias, who sent Jason on a quest for the golden fleece.
Although Apollodorus combines the two men, there seems to have originally been two Aeolus's. One, the king of the winds in Aeolia, and the other a king of Iolcus in Thessaly.
Apollonius Rhodius. Argonautica.