(Ἰσέας), tyrant of Ceryneia in Achaia, at the period of the first rise of the Achaean league. Alarmed at the rapid progress of the confederacy --the four cities of Dyme, Patrae, Tritaea, and Pharae, which formed the original league, having been already joined by Aegium and Bura--he judged it prudent to provide for his personal safety by voluntarily abdicating the sovereign power, whereupon Ceryneia immediately joined the Achaeans. (Plb. 2.41.)