Ogyges was the founder and king of Thebes in Greece. During his reign a devastating flood ruined the country to such an extent that it remained without kings until the reign of Cecrops. In a 2002 article(b) in the Times of Malta, Anton Mifsud informed us that “the classical historian Eumalos of Cyrene wrote that the King of Atlantis at the time of the cataclysm was Ogyge whose nephew King Ninus of Babylon lived in the late third millennium BC.”
Some writers have identified the Flood of Ogyges with the Flood of Deucalion. It is more likely that they were separate events and were part of the series of floods noted by Plato [Tim.22 & Crit.111-112].
Frank Joseph in Survivors of Atlantis points out that Plato in his Laws dated the Ogygean flood to less than two thousand years before his time, a figure compatible with the date of 2136 BC given by Varro the Roman writer.
Oliver D.Smith maintained that it was the flood of Ogyges that destroyed Atlantis and argued that this event occurred long before the Flood of Deucalion(a).
(a) https://www.academia.edu/3507001/Atlantis_as_Sesklo (now offline)