Aegealeus

In Greek mythology, Aegialeus (also Aegealeus, Egialeus) is the name of several mythological figuresAegialeus was the elder son of Adrastus, a king of Argos, and either Amphithea or Demonassa. Aegialeus was identified as one of the Epigoni, who avenged their fathers' disastrous attack on the city of Thebes by retaking the city, by both Pausanias and Hellanikos. While his father was the only one of the Seven Against Thebes who did not die in the battle, Aegialeus was the only one of the leaders of the Epigoni who was killed while they retook the city.  Laodamas, the son of Eteocles, killed him at Glisas, and he was buried at Pagae in Megaris. Adrastus died of grief after his son's death, and Cyanippus, who was either the son or the brother of Aegialeus, succeeded him as the king of Argos.Aegialeus was one of the sons of the river god Inachus. His mother was the Oceanid  Melia, and his brother was Phoroneus. In variant myth he was called the son of Phoroneus by the goddess Peitho. He was the founder of Sicyon. He was usually said to have died childless. In other stories he was the father of Europs, in a variant  genealogy that makes him the ancestor of  Apis (both of these figures were usually called the sons of Phoroneus). Aegialeus was the first inhabitant of Sicyon, and ruled over the district of the Peloponnese called Aegialus after him. He also founded the city of Aegialea.Aegialeus was, in a tradition followed by Pacuvius, Justin,, and Diodorus, the name given to the son of Aeëtes, who was murdered by Medea. Other traditions call this figure Absyrtus.
See more at Wikipedia.org...

[Greek heroic] The son of Adrastus. When the sons of the heroes who died in the expedition of the Seven Against Thebes wanted to avenge their fathers, Aegealus joined them. This penal expedition was called the war of the Epigonoi. They succeeded in taking the city, but Aegealeus, however, was killed.