(Μεγαπένθης/Megapénthēs, ‘very sorrowful’).
 Son of King Proetus of Argos
Son of King Proetus of Argos (Apollod. 2,29), father of Argeus and grandfather of Anaxagoras (Paus. 2,18,4) or father of Anaxagoras and Iphianira (Diod. Sic. 4,68,4; cf. also Iphianassa ). M. exchanged kingdoms with Perseus, so that he ruled over Argos and Perseus over Tiryns. According to Hyginus (Hyg. Fab. 244), he was said to have killed Perseus for the murder of his father.