Proetus (proh-EE-tus). King of Tiryns, brother of Perseus's grandfather, King Acrisius of Argos. When his wife falsely accused Bellerophon of making amorous advances, Proetus sent the hero to King Iobates of Lycia with sealed instructions that he be put to death on arrival. Iobates thought to accomplish this by sending him after the Chimaera, but Bellerophon killed the beast instead. On another occasion, the daughters of Proetus were driven mad by Hera and roamed the countryside in a frenzy thinking they were cows.