Danaus

Danaus (Ancient Greek: Δαναός) was a king of Egypt from Greek mythology. He was a son of Belus and Achiroe and the twin brother of Aegyptus.

Mythology
Danaus had fifty daughters, called the Danaides, with several different women and his twin brother had fifty sons. Aegyptus wished to have his fifty sons marry Danaus' fifty daughters but Danaus did not want that. Danaus and his daughters fled to Argos. Danaus ascended to the throne of Argos but Aegyptus and his sons arrived to marry their cousins. It was decided which man married which woman in a foot race. The first man to finish the foot race married the first woman, the second man married the second woman, and so on and so forth.

Danaus instructed his daughters to murder all of their husbands on their weddings nights. Forty-nine of his daughters killed their husbands; Hypermnestra was the only one who didn't kill her husband because he honored her wish to remain a virgin. Out of anger, Danaus threw his daughter to the Argive courts but she was saved by Aphrodite.

Later, Hypermnestra's husband Lynceus killed Danaus out of revenge.