In Greek mythology, Belus (Ancient Greek: Βῆλος, romanized: Bêlos) was a king of Egypt and father of Aegyptus and Danaus and (usually) brother to Agenor. The wife of Belus has been named as Achiroe or Side (eponym of the Phoenician city of Sidon).
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Family
Belus was the son of Poseidon and Libya or of Zeus and Lybee (i.e. Libya). He may also be Busiris, son of Libya, ruler of Egypt, killed by Heracles, although Heracles was born many generations after Belus since he was a great-grandchild of Perseus; see Argive genealogy below.
Apollodorus also claims that Agenor was Belus's twin brother. Belus ruled in Egypt, and Agenor ruled over Sidon and Tyre in Phoenicia. The wife of Belus has been named as Achiroe, daughter of the river-god Nilus. Her sons Aegyptus and Danaus were twins. Later Aegyptus ruled over Egypt and Arabia, and Danaus ruled over Libya. Apollodorus says that it was Euripides who added Cepheus and Phineus as additional sons of Belus.
In the Hesiodic Catalogue of Women, Belus was also the father of a daughter named Thronia on whom Hermaon, i.e. Hermes, fathered Arabus, presumably the eponym of Arabia.
According to Pherecydes of Athens, Belus also had a daughter named Damno who married Agenor (Belus's brother, her uncle) and bore to him Phoenix and two daughters named Isaie, and Melia, these becoming wives respectively to sons of Belus (their cousins) Aegyptus and Danaus. Yet another source says that the daughter of Belus who married Agenor was named Antiope.