Danaus

In Greek mythology Danaus (/ˈdæn.eɪ.əs/; Ancient Greek: Δαναός Danaos), was the twin brother of Aegyptus, a mythical king of Egypt. The myth of Danaus is a foundation legend (or re-foundation legend) of Argos, one of the foremost Mycenaean cities of the Peloponnesus. In Homer's Iliad, "Danaans" ("tribe of Danaus") and "Argives" commonly designate the Greek forces opposed to the Trojans.

Danaus had fifty daughters, the Danaides, twelve of whom were born to Polyxo and the rest to Pieria and other women, and his twin brother, Aegyptus, had fifty sons. Aegyptus commanded that his sons marry the Danaides. Danaus elected to flee instead, and to that purpose, he built a ship, the first ship that ever was.

In it, he fled to Argos, to which he was connected by his descent from Io, a priestess of Hera at Argos, who was wooed by Zeus and turned into a heifer and pursued by Hera until she found asylum in Egypt. Argos at the time was ruled by King Pelasgus, the eponym of all autochthonous inhabitants who had lived in Greece since the beginning, also called Gelanor ("he who laughs"). The Danaides asked Pelasgus for protection when they arrived, the event portrayed in The Suppliants by Aeschylus. Protection was granted after a vote by the Argives.

...
Wikipedia