The Peloponnesos, the Greek peninsula jutting into the Mediterranean, was named after Pelops, a famous greek king who lived circa 1400 b.c. Pelops was the great grandfather of Hercules, of Jason and the Argonauts fame, they sailed throughout the Mediterranean according to that great epic. And Theseus was also a great grandson of Pelops, king Theseus who slew the monster Minotaur at Knossos ruled my Minos, surely all historical characters, their lineages anciently well documented.
Theseus was a son of Aethra, who was a daughter of Pittheus, who was a son of Pelops, that lineage certain, so because Theseus is mentioned in Plato’s Atlantis as having lived in the timeframe that Atlantis (and much of Greece) was consumed by the sea, you can safely say that Plato likely knew that the egyptians’ date of 9600 b.c. for the demise of Atlantis was far off the mark, this particularly since the legendary flood of Ogyges occurred circa 1500 b.c., the same timeframe as was the family of Pelops, the transition period from bronze to iron age, which was the end of the Ice Age (http://genesisveracityfoundation.com/ice-age-hydrology).
Hercules and the other Argonauts with Jason ventured into the Lake Tritonis where now is the parched Sahara of southern Tunisia, that ancient lake basin now called the Great Eastern Erg, so when the Argonauts were there, about two centuries after the end of the Ice Age, the lake was probably half dried up, more proof that the Ice Age ended actually circa 1500 b.c., certainly not circa 10000 b.c. as mainstream scientists would have us believe. And the fact that Plato used the word nesos describing the geography of greater Atlantis, like nesos in Peloponnesos, tells us that was the Iberian peninsula, Atlantis a coastal empire consumed by the sea when the Ice Age ended, spread the word.