For the Athenian orator with a similar name, see Aesion

Aesion

Aeson was an Athenian orator, and a contemporary of Demosthenes, with whom he was educated. To what party he belonged during the Macedonian time is uncertain...

.

In Greek mythology

Greek mythology

Greek mythology is the body of myths and legends belonging to the ancient Greeks, concerning their gods and heroes, the nature of the world, and the origins and significance of their own cult and ritual practices. They were a part of religion in ancient Greece...

, Aeson or Aison was the son of Cretheus

Cretheus

In Greek mythology, Cretheus or Krētheus was the king and founder of Iolcus, the son of Aeolus and Enarete. His wives were Tyro and either Demodice or Biadice. With Tyro, he fathered Aeson, Pheres, and Amythaon...

 and Tyro

Tyro

In Greek mythology, Tyro was the daughter of Salmoneus and married Cretheus, but loved Enipeus. She gave birth to Pelias and Neleus, the twin sons of Poseidon. With Cretheus she had Aeson, Pheres, and Amythaon....

, who also had his brothers Pheres

Pheres

In Greek mythology, Pheres , son of Cretheus and Tyro and brother of Aeson and Amythaon, was the founder of Pherae in Thessaly. He fled there from Iolcus after his half-brother, Pelias, seized the throne...

 and Amythaon. Aeson was the father of Jason

Jason

Jason was a late ancient Greek mythological hero from the late 10th Century BC, famous as the leader of the Argonauts and their quest for the Golden Fleece. He was the son of Aeson, the rightful king of Iolcus...

 and Promachus

Promachus

Promachus is a name that refers to several different people.-Mythology:*Son of Aeson and Alcimede, killed by Pelias along with his father while his brother, Jason, searched for the Golden Fleece....

 with Polymede, the daughter of Autolycus

Autolycus

In Greek mythology, Autolycus was a son of Hermes and Chione. He was the husband of Neaera, or according to Homer, of Amphithea...

. Other sources say the mother of his children was Alcimede

Alcimede

In Greek mythology, Alcimede was one of the matrilineal Minyan daughters, the daughter of Clymene, Minyas' daughter. She was the mother of Jason by Aeson, whom she met in the caves below Iolcus in Thessaly, a chthonic lair where the rightful king Aeson had been imprisoned by his evil...

 or Amphinome

Amphinome

Amphinome may refer to:* Characters in Greek mythology:** Amphinome the Nereid** Amphinome, wife of Aeson and mother to Jason and Promachus. She and her husband were persecuted by king Pelias of Iolcus. Amphinome killed herself with a sword...

. Aeson's mother Tyro

Tyro

In Greek mythology, Tyro was the daughter of Salmoneus and married Cretheus, but loved Enipeus. She gave birth to Pelias and Neleus, the twin sons of Poseidon. With Cretheus she had Aeson, Pheres, and Amythaon....

 had two other sons, Neleus

Neleus

Neleus was the son of Poseidon and Tyro and brother of Pelias. Tyro was married to Cretheus but loved Enipeus, a river god. She pursued Enipeus, who refused her advances. One day, Poseidon, filled with lust for Tyro, disguised himself as Enipeus and from their union was born Pelias and Neleus,...

 and Pelias

Pelias

Pelias was king of Iolcus in Greek mythology, the son of Tyro and Poseidon. His wife is recorded as either Anaxibia, daughter of Bias, or Phylomache, daughter of Amphion. He was the father of Acastus, Pisidice, Alcestis, Pelopia, Hippothoe, Asteropia, and Antinoe.Tyro was married to Cretheus...

, with the god of the sea Poseidon

Poseidon

Poseidon was the god of the sea, and, as "Earth-Shaker," of the earthquakes in Greek mythology. The name of the sea-god Nethuns in Etruscan was adopted in Latin for Neptune in Roman mythology: both were sea gods analogous to Poseidon...

.

Pelias was power-hungry and he wished to gain dominion over all of Thessaly

Thessaly

Thessaly is a traditional geographical region and an administrative region of Greece, comprising most of the ancient region of the same name. Before the Greek Dark Ages, Thessaly was known as Aeolia, and appears thus in Homer's Odyssey....

. To this end, he banished Neleus and Pheres and locked Aeson in the dungeons in Iolcus. Aeson sent Jason to Chiron

Chiron

In Greek mythology, Chiron was held to be the superlative centaur among his brethren.-History:Like the satyrs, centaurs were notorious for being wild and lusty, overly indulgent drinkers and carousers, given to violence when intoxicated, and generally uncultured delinquents...

 to be educated while Pelias, afraid that he would be overthrown, was warned by an oracle

Oracle

In Classical Antiquity, an oracle was a person or agency considered to be a source of wise counsel or prophetic predictions or precognition of the future, inspired by the gods. As such it is a form of divination....

 to beware a man wearing one sandal.

Many years later, Pelias was holding the Olympics in honor of Poseidon when Jason, rushing to Iolcus, lost one of his sandals in a river while helping Hera (Juno), in the form of an old woman cross. When Jason entered Iolcus, he was announced as a man wearing one sandal. Paranoid, Pelias asked him what he (Jason) would do if confronted with the man who would be his downfall. Jason responded that he would send that man after the Golden Fleece

Golden Fleece

In Greek mythology, the Golden Fleece is the fleece of the gold-haired winged ram, which can be procured in Colchis. It figures in the tale of Jason and his band of Argonauts, who set out on a quest by order of King Pelias for the fleece in order to place Jason rightfully on the throne of Iolcus...

. Pelias took that advice and sent Jason to retrieve the Golden Fleece.

During Jason's absence, Pelias intended to kill Aeson. However, Aeson committed suicide by drinking bull's blood. His wife killed herself as well, and Pelias murdered their infant son Promachus

Promachus

Promachus is a name that refers to several different people.-Mythology:*Son of Aeson and Alcimede, killed by Pelias along with his father while his brother, Jason, searched for the Golden Fleece....

.

Alternatively, he survived until Jason and his new wife, Medea

Medea

Medea is a woman in Greek mythology. She was the daughter of King Aeëtes of Colchis, niece of Circe, granddaughter of the sun god Helios, and later wife to the hero Jason, with whom she had two children, Mermeros and Pheres. In Euripides's play Medea, Jason leaves Medea when Creon, king of...

, came back to Iolcus. She slit Aeson's throat, then put his corpse in a pot and Aeson came to life as a young man. She then told Pelias' daughters she would do the same for their father. They slit his throat and Medea refused to raise him, so Pelias stayed dead.