Zoraster i believe
no, it was Plato's Great Grand Uncle came back from Egypt
the Library of Alexandria
an Egyptian Priest ( Librarian actually)
had told of Atlantis and handed some scrolls to the Uncle
the Uncle, obviously had parchment or something that chronolog the
civ when he returned to greece and Plato was informed by his Uncle and the scrolls or codexes.
The Priest as he spoke of Atlantis Told the Uncle that these people invaded
and settled along the Coast of the Med.
when they attempted to invade the Uncles Country ( Greece)
That his people ( the Greeks) had driven them back and out to Sea.
supporting evidence in Etymological venue is lacking, mainly because of the sacking and looting of the Library by ƒükkêd up ignorant Zealots.