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Aeacus, a MythSource painting
Greek

Aeacus

The Most Just · King of Aegina · Judge of the Dead

01Identity

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.

Top questions
  • 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 Myrmidons
    Source

    Source

    • The Greek Myths
  • What family links are recorded for Aeacus?

    Father: Zeus, Mother: Aegina, Spouse: Endeïs, 4 children.
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.

ZeusAegina
Aeacus

with Endeïs

AlcimachePeleusPhocusTelamon
03The names

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

04The myths

2 myths, each traced to its primary text and corpus sources.

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.

The Creation of the Myrmidons, a MythSource painting of the scene

In the modern world

No modern rework confirmed yet.

2 sources· checked 2026-08-18

  1. 1The Greek MythsT1
  2. 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

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.

The Death of Phocus, a MythSource painting of the scene

In the modern world

No modern rework confirmed yet.

3 sources· checked 2026-08-18

  1. 1The Greek MythsT1
  2. 2Ovid, MetamorphosesT1

    Quote

    After Phocus is killed, Aeacus drives Peleus and Telamon from Aegina for their part in his death.

    Ovid, Metamorphoses

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

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

The film

The Underdrawing video on Aeacus embeds here once it publishes.

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