So there are all kinds of problems with what you've said here, most of which I'm not going to/am not properly qualified to address, but let me make something clear: there is no Atlantean tradition independent from Plato. Plato is the originator of Atlantis. Another place to look. Ancient scholars unanimously agreed that Plato had made up Atlantis, and that there was no independent mythical tradition for such a place. The only possible exception, Posidonius, considered Atlantis' possible real existence not because he knew of some independent tradition (it's quite clear from Strabo that he knows of no such thing) but because it made for an interesting thought experiment. The modern conspiracy belief in a real Atlantis or of an independent mythic tradition derives from a social darwinistic movement of the late Victorian Period deeply rooted almost from its inception in "Nordic Enthusiasm." There is no independent Atlantean tradition. Plato's story is not related to any previous cycle of folklore (except in, perhaps, certain broad literary themes like cataclysmic destruction or excessive hubris--Plato had abundant examples of such things in his own time, however, and it is not necessary to go beyond the obvious allegories to the Peloponnesian War) and certainly not to any Jewish tradition of which he knew next to, if not absolutely, nothing