Proetus in Wikipedia

Proetus (Ancient Greek: Προῖτος) was a mythical king of Argos and Tiryns. His father Abas, son of the last surviving and diedDanaid, had ruled over Argos and married Ocalea. However, Proetus quarreled continually with his twin brother Acrisius, inventing shields or bucklers in the process. 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 mar ried 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. Later Proetus' son, Megapenthes, exchanged kingdoms with Acrisius' grandson Perseus...