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Cretheus, a MythSource painting
Greek

Cretheus

King of Iolcus · Son of Aeolus · Founder of Iolcus

01Identity

Cretheus was the founder and king of Iolcus, a Greek hero and son of Aeolus. His marriage to Tyro produced Aeson, Amythaon and Pheres, linking the family with Jason and Iolcus. The wider family story includes Tyro’s sons by Poseidon, who later avenged her against Sidero.

Top questions
02Family

Parents above, children below, and the figure’s consorts named in between, the same family data as the fact box, laid out as a chart instead of a field list.

AiolosEnarete
Cretheus

with Demodice, Tyro

AesonAmythaonAstydameiaMyrinaNeleusPeliasPheres
03The myths

1 myth, each traced to its primary text and corpus sources.

Tyro wandered beside the River Enipeus, grieving and speaking to its waters. She was the daughter of Salmoneus and Alcidice, and had been raised by Cretheus, Salmoneus’s brother. Poseidon took the appearance of Enipeus and lay with her. She conceived twins and gave birth to them in secret. Unable to face Sidero’s anger, she exposed the infants on a mountain. Some say that the twins were instead set afloat on the Enipeus in a wooden ark.

A passing horse-trainer found the children. His mare struck one of them in the face, leaving a dark bruise. The horse-trainer took both infants home and raised them. He called the bruised child Pelias and the other Neleus. Another account says that the horse-herd’s wife gave Pelias to the mare to suckle, while Neleus was fostered by a bitch and took on a savage nature. When the twins grew up, they discovered their mother’s identity and learned that Sidero had treated her cruelly.

Pelias and Neleus went against Sidero. She fled to the sanctuary of Hera, but Pelias killed her at the altar. Pelias then settled in Thessaly and lived at Iolcus, where he was a great breeder of sheep. Neleus lived in Pylos. Both brothers served Zeus with all their might.

Cretheus founded Iolcus and married Tyro. She bore him three sons, Aeson, Amythaon, and Pheres. Aeson was the father of Jason. Amythaon lived in Pylos and became the father of Bias and Melampous. Pelias, as Tyro’s son by Poseidon, was Aeson’s half-brother. After Cretheus, Pelias held the position at Iolcus, although his right to succeed was disputed.

Cretheus, Tyro, and the Royal Line, a MythSource painting of the scene

In the modern world

No modern rework confirmed yet.

3 sources· checked 2026-08-19

  1. 1The Greek MythsT1
  2. 2Apollodorus, The LibraryT1

    Quote

    Tyro bore Poseidon’s twins, Pelias and Neleus, who were exposed, rescued, and later avenged their mother by killing Sidero at Hera’s altar.

    Apollodorus, The Library

  3. 3The Library of Greek Mythology (Oxford World's Classics)T1

The myths across MythSource where Cretheus features, each on that figure’s page.

The film

The Underdrawing video on Cretheus embeds here once it publishes.