Proetus was a mythical king of Argos and Tiryns. His father Abas, son of the last surviving Aegyptiad Lynceus and the Danaid Hypermnestra, had ruled over Argos and married Aglaea or Ocalea, who bore him twin sons, Proetus and Acrisius, who quarreled continually ever since they still were in the womb. They carried on with the rivalry into their adult years, inventing shields or bucklers in the process. In one tradition, the conflict was reiterated when Proetus seduced Acrisius' daughter (and his own niece) Danae. Proetus started out as king of Argos, and held the throne for about seventeen years, but Acrisius defeated and exiled him and he fled to King Jobates or Amphianax in Lycia, and married his daughter Antea or Stheneboea. Jobates, thereupon, attempted to restore Proetus to his kingdom by armed force. After the war had gone on for a while the kingdom was divided in two. Acrisius then shared his kingdom with his brother, surrendering to him Tiryns and the eastern half of Argolis, i.e. the Heraeum, Midea and the coast of Argolis.