Phegeus was a 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...

 king who offered succor and his daughter, Arsinoe (named Alphesiboea

Alphesiboea

Alphesiboea was the name of several characters in Greek mythology:*Alphesiboea, the mother of Adonis with Phoenix .*Alphesiboea, a daughter of Phegeus, who married Alcmaeon. In some versions of this myth, she is called Arsinoe....

 in some versions), to Alcmaeon, who was fleeing from the Erinyes

Erinyes

In Greek mythology the Erinyes from Greek ἐρίνειν " pursue, persecute"--sometimes referred to as "infernal goddesses" -- were female chthonic deities of vengeance. A formulaic oath in the Iliad invokes them as "those who beneath the earth punish whosoever has sworn a false oath"...

. Alcmaeon left his mother's, Eriphyle

Eriphyle

In Greek mythology, Eriphyle , daughter of Talaus, was the mother of Alcmaeon and the wife of Amphiaraus. Eriphyle persuaded Amphiaraus to take part in the raid that initiated the mythic tale of the Seven Against Thebes, though she knew he would die...

's, jewelry and clothing with him and then returned for it later in order to please the river god Achelous

Achelous

In Greek mythology, Achelous was the patron deity of the "silver-swirling" Achelous River, which is the largest river of Greece, and thus the chief of all river deities, every river having its own river spirit. His name is pre-Greek, its meaning unknown...

 and have his daughter, Callirhoe

Callirhoe

Callirrhoe may refer to:* In Greek mythology:** Callirrhoe , a daughter of Oceanus and mother of Geryon, one of the Oceanids...

, in marriage. Phegeus had his sons Agenor

Agenor, son of Phegeus

Agenor was a son of Phegeus, king of Psophis, in Arcadia. He was brother of Pronous and Arsinoe, who was married to, and later abandoned by, the Argive Alcmaeon...

 and Pronous kill Alcmaeon.