Aegimius was the Greek mythological

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...

 ancestor of the Dorians, who is described as their king and lawgiver at the time when they were yet inhabiting the northern parts 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....

. He asked Heracles

Heracles

Heracles ,born Alcaeus or Alcides , was a divine hero in Greek mythology, the son of Zeus and Alcmene, foster son of Amphitryon and great-grandson of Perseus...

 for help in a war against the Lapiths and, in gratitude, offered him one-third of his kingdom. The Lapiths were conquered, but Heracles did not take for himself the territory promised to him by Aegimius, and left it in trust to the king who was to preserve it for the sons of Heracles, the Heracleidae

Heracleidae

In Greek mythology, the Heracleidae or Heraclids were the numerous descendants of Heracles , especially applied in a narrower sense to the descendants of Hyllus, the eldest of his four sons by Deianira Other Heracleidae included Macaria, Lamos, Manto, Bianor, Tlepolemus, and Telephus...

Aegimius had two sons, Dymas

Dymas

In Greek mythology, Dymas is the name attributed to at least four individuals.- Dymas :The first Dymas was a Phrygian king and father of Hecuba , wife to King Priam of Troy...

 and Pamphylus

Pamphilus (mythology)

Pamphilus , a son of Aegimius and brother of Dymas, was king of the Dorians at the foot of mount Pindus, and along with the Heracleidae invaded Peloponnesus. After him, a tribe of the Sicyonians was called Pamphyli....

, who migrated to the Peloponnese

Peloponnese

The Peloponnese, Peloponnesos or Peloponnesus , is a large peninsula , located in a region of southern Greece, forming the part of the country south of the Gulf of Corinth...

 and were regarded as the ancestors of two branches of the Doric race, the Dymanes and the Pamphylia

Pamphylia

In ancient geography, Pamphylia was the region in the south of Asia Minor, between Lycia and Cilicia, extending from the Mediterranean to Mount Taurus . It was bounded on the north by Pisidia and was therefore a country of small extent, having a coast-line of only about 75 miles with a breadth of...

ns of Anatolia, while the third branch, the Hylleans, derived its name from Hyllas, the son of Heracles, who had been adopted by Aegimius.

There existed in antiquity an epic poem Aegimius of which a few fragments are still extant,
and which is sometimes ascribed to Hesiod

Hesiod

Hesiod was a Greek oral poet generally thought by scholars to have been active between 750 and 650 BC, around the same time as Homer. His is the first European poetry in which the poet regards himself as a topic, an individual with a distinctive role to play. Ancient authors credited him and...

 and sometimes to Cercops of Miletus. The poem, printed among Hesiodic fragments, survives in fewer than a dozen quotations, and seems to have been in part concerned with the myth of Io

Io (mythology)

Io was, in Greek mythology, a priestess of Hera in Argos, a nymph who was seduced by Zeus, who changed her into a heifer to escape detection. His wife Hera set ever-watchful Argus Panoptes to guard her, but Hermes was sent to distract the guardian and slay him...

 and Argos Panoptes

Argus Panoptes

In Greek mythology, Argus Panoptes or Argos, guardian of the heifer-nymph Io and son of Arestor, was a primordial giant whose epithet "Panoptes", "all-seeing", led to his being described with multiple, often one hundred, eyes. The epithet Panoptes was applied to the Titan of the Sun, Helios, and...

.