Aeacus in Greek tradition
King of Aegina, Aeacus prayed for subjects after a plague had emptied the island. Zeus answered by transforming the ants on a sacred oak into the industrious Myrmidons, who later followed Achilles at Troy. Known for justice, Aeacus became one of the judges of the dead alongside Minos and Rhadamanthus, while on earth he banished his sons Telamon and Peleus after Phocus was murdered.
The quick answers
Who is Aeacus?
Aeacus is a Greek being associated with Aegina and its kingship, justice and righteousness, judgment of the dead, the Myrmidons.Source
Source
- The Greek Myths
- Classical Mythology a to Z
- The Library of Greek Mythology (Oxford World's Classics)
What is Aeacus associated with?
Aegina and its kingship, justice and righteousness, judgment of the dead, the MyrmidonsSource
Source
- The Greek Myths
What family links are recorded for Aeacus?
Father: Zeus, Mother: Aegina, Spouse: Endeïs, 4 children.
Aeacus’s family, at a glance
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.
The names Aeacus answers to
Aiakos
Greek form of the name Aeacus
SourceClassical Mythology a to Z
Aiacus
Latin form of the name Aeacus
SourceClassical Mythology a to Z
The Most Just
A title emphasizing Aeacus’s exceptional righteousness
SourceThe Library of Greek Mythology (Oxford World's Classics)
Judge of the Dead
Underworld judge alongside Minos and Rhadamanthus
SourceThe Greek Myths
King of Aegina
Ruler and founding king of the island of Aegina
SourceClassical Mythology a to Z
The myths of Aeacus
2 myths, each traced to its primary text and corpus sources.
The Creation of the Myrmidons
A plague struck Aegina and blew for four months. Crops and pastures dried up, and famine followed. Thirst afflicted the islanders most severely. When the wine ran out, they crawled to the nearest streams and died after drinking the poisonous water. Appeals to Zeus brought no relief. The starving people and their sacrificial animals fell dead before his altars, until hardly any warm-blooded creature remained alive.
Aeacus continued to pray. He was the son of Zeus and Aegina, the woman after whom the island was named. One day, thunder and lightning answered his prayers. Taking this as a favourable sign, Aeacus asked Zeus to repopulate the empty land with as many subjects as there were ants carrying grains of corn up a nearby oak. The tree had grown from an acorn brought from Dodona and was sacred to Zeus. At Aeacus’s request, it trembled, although no wind moved its branches. Aeacus was afraid, but stayed. He kissed the tree trunk and the earth beneath it repeatedly.
That night, Aeacus dreamed that he saw a shower of ants. Zeus then changed the ants into human beings. The new people became Aeacus’s subjects and were called the Myrmidons. They were regarded as industrious because of their origin, and also as brave. Aeacus later ruled Aegina and was honoured for his piety. The Myrmidons became his people and, in later generations, followed Achilles, Aeacus’s grandson, to the Trojan War, where they fought beside Achilles and Patroclus.
Some accounts connect the name with King Myrmidon, whose daughter Eurymedusa was seduced by Zeus in the form of an ant. Others derive it from Myrmex, a companion of Athene who claimed credit for the invention of the plough and was changed into an ant as punishment. Another account says that the Aeginetans called themselves Myrmidons because they had to clear stones from the soil before they could cultivate it.

In the modern world
No modern rework confirmed yet.
2 sources· checked 2026-08-18
- 1The Greek MythsT1
- 2Homer, OdysseyT1
Quote
“Aeacus is presented as Peleus’s father, while Achilles, his grandson, is remembered as leader of the Myrmidons at Troy.”
Homer, Odyssey
The Death of Phocus
Telamon hurled a discus at Phocus’s head while they exercised together, killing him. Peleus helped Telamon carry the body away and hide it in a wood. The brothers had challenged Phocus to a fivefold athletic contest, because his skill in the games had made them jealous. In one account, Telamon was chosen by lot to kill him. Another account says that Telamon felled him as if by accident, though Aeacus rejected this explanation.
Phocus was the youngest son of Aeacus and the Nereid Psamathe. She had changed herself into a seal while unsuccessfully trying to escape Aeacus’s embraces. Telamon and Peleus were Aeacus’s elder sons by Endeis, daughter of Sciron. All three brothers lived on Aegina, where Phocus was Aeacus’s favourite. Their mother encouraged Telamon and Peleus to plot against him.
Aeacus discovered the murder and banished both sons from Aegina. Telamon later tried to defend himself by claiming that Phocus’s death had been accidental. He sailed at night into what was later called the Secret Harbour and sent masons ashore to build a mole, which he used as a platform from which to make his plea. Aeacus refused to accept it, so Telamon returned to Salamis. Peleus was also driven into exile.

In the modern world
No modern rework confirmed yet.
3 sources· checked 2026-08-18
- 1The Greek MythsT1
- 2Ovid, MetamorphosesT1
Quote
“After Phocus is killed, Aeacus drives Peleus and Telamon from Aegina for their part in his death.”
Ovid, Metamorphoses
- 3The Library of Greek Mythology (Oxford World's Classics)T1
Also appears in
The myths across MythSource where Aeacus features, each on that figure’s page.
- Asopus and Metope · on Asopus
- The Thunderbolt and the Black Waters · on Asopus
- Minos as Judge of the Dead · on Minos
- Osiris Becomes King of Egypt · on Osiris
- Osiris Rises as Lord of the Dead · on Osiris
- Peleus and Telamon Murder Phocus · on Peleus
- Rhadamanthus Becomes Judge of the Dead · on Rhadamanthus
- Sisyphus Reveals Zeus's Abduction of Aegina · on Sisyphus
- Telamon Becomes King of Salamis · on Telamon
- Telamon Marries Periboea and Fathers Ajax · on Telamon
- The Birth of Telamon · on Telamon
- Zeus and Aegina · on Zeus
What this page is built from
About this page
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4 sources are cited on this page, primary texts and corpus scholarship, listed below.
Cite this page
MythSource. (n.d.). Aeacus. https://www.mythsource.com/figures/aeacus
"Aeacus." MythSource, n.d., www.mythsource.com/figures/aeacus.
"Aeacus." MythSource. n.d. https://www.mythsource.com/figures/aeacus.
The mythology summaries and identity fields on this page are grounded in the primary texts and scholarship above. The appearance table records candidates separately; only reviewed joins are presented as modern reworks in Overview.
The film
The Underdrawing video on Aeacus embeds here once it publishes.
