I would just make the correction that Egypt's 25th Dynasty of Black/Nubian pharaohs goes back as far as 754 B.C., not merely 500 B.C.
https://en.m.wikipedia.org/wiki/Twenty-fifth_Dynasty_of_Egypt
Discussion
yes, it goes back at least until the previous quarter cycle of 6500 years
according to The Apocalypse of Yajnavalkya, sometime around 8000 years ago, the atlanteans abandoned their egyptian settlements and disappeared, and the africans came and occupied it, setting up the dynastic phase of the history
they even mutilated the sphinx to make it look african