Anaxagoras was the son of Argeos and Pyrante. He succeeded his father as King of Argos. He was the third Preotid King of Argos because his grandfather, Megapenthes, swapped the Kingdom of Mycenae for that of Argos. Anaxagoras had two children by his wife Hyrmine. His sons were Alector and Iphis. Both succeeded their father as king over his third. His grandson (through Ihpis) was Sthenelius, who inherited the Melampid third of Argos. Sthenelius' son Cylabares inherited the last third, reuniting Argos.