Agenor was a son of Phegeus

Phegeus

Phegeus was a Greek mythological king who offered succor and his daughter, Arsinoe , to Alcmaeon, who was fleeing from the Erinyes. Alcmaeon left his mother's, Eriphyle's, jewelry and clothing with him and then returned for it later in order to please the river god Achelous and have his daughter,...

, king of Psophis

Psophis

Psophis was an ancient Greek city in the northwest end of Arcadia, bounded on the north by Arcadia, and on the west by Elis.-City name and mythology:...

, in Arcadia

Arcadia

Arcadia is one of the regional units of Greece. It is part of the administrative region of Peloponnese. It is situated in the central and eastern part of the Peloponnese peninsula. It takes its name from the mythological character Arcas. In Greek mythology, it was the home of the god Pan...

. He was brother of Pronous and Arsinoe, who was married to, and later abandoned by, the Argive Alcmaeon. When Alcmaeon wanted to give the celebrated necklace

Necklace of Harmonia

The Necklace of Harmonia was a fabled object in Greek mythology that, according to legend, brought great misfortune to all of its wearers or owners, who were primarily queens and princesses of the ill-fated House of Thebes...

 and peplos

Peplos

A peplos is a body-lengthGreek garment worn by women before 500 BC. The peplos is a tubular cloth folded inside-out from the top about halfway down, altering what was the top of the tube to the waist and the bottom of the tube to ankle-length. The garment is then gathered about the waist and the...

 of Harmonia

Harmonia (mythology)

In Greek mythology, Harmonia is the immortal goddess of harmony and concord. Her Roman counterpart is Concordia, and her Greek opposite is Eris, whose Roman counterpart is Discordia.-Origins:...

--which had formerly belonged to Arsinoe—to his second wife Calirrhoe, the daughter of 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...

, he was slain by Agenor and Pronous at the instigation of Phegeus. But when the two brothers came to Delphi

Delphi

Delphi is both an archaeological site and a modern town in Greece on the south-western spur of Mount Parnassus in the valley of Phocis.In Greek mythology, Delphi was the site of the Delphic oracle, the most important oracle in the classical Greek world, and a major site for the worship of the god...

, where they intended to dedicate the necklace and peplos, they themselves were killed by Amphoterus

Amphoterus

Amphoterus or Amphoteros may refer to:*Amphoterus son of Alcmaeon by Callirrhoe, and brother of Acarnan*Amphoterus a Trojan of this name occurs Homer Il. xvi. 415.*Amphoterus of Alexander the Great...

 and Acarnan

Acarnan

In Greek mythology, Acarnan , one of the Epigones, was a son of Alcmaeon and Callirrhoe, and brother of Amphoterus. Their father was murdered by Phegeus , when they were yet very young, and Calirrhoe prayed to Zeus to make her sons grow quickly, that they might be able to avenge the death of their...

, the sons of Alcmaeon and Calirrhoe.

Pausanias

Pausanias (geographer)

Pausanias was a Greek traveler and geographer of the 2nd century AD, who lived in the times of Hadrian, Antoninus Pius and Marcus Aurelius. He is famous for his Description of Greece , a lengthy work that describes ancient Greece from firsthand observations, and is a crucial link between classical...

, who relates the same story, writes that the children of Phegeus were named Temenus, Axion, and 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....

.