According to the Watchtower's Insight Encyclopedia :
The catastrophic destruction of men and animals by an overwhelming flood in the days of Noah, 2370 B.C.E. This greatest cataclysm in all human history was sent by Jehovah because wicked men had filled the earth with violence. The survival of righteous Noah and his family, eight souls in all, together with selected animals, was by means of a huge ark, or chest.—Ge 6:9–9:19; 1Pe 3:20;
So, the Bible book of Genesis says in chapter 10 (according to the New International Version):
This is the account of Shem, Ham and Japheth, Noah’s sons, who themselves had sons after the flood....The sons of Ham: Cush, Egypt, Put and Canaan.....Egypt was the father of the Ludites, Anamites, Lehabites, Naphtuhites, Pathrusites, Kasluhites (from whom the Philistines came) and Caphtorites.
Therefore, the book of Genesis tells us that the egyptians became to exist after the Flood, after 2370 BC. Nevertheless, the Egyptian Museum in Cairo recently began putting on display the country's oldest papyruses, which date back 4500 years (2500 BC), detailing the daily life of the pyramid-builders. So, this papyrus is somewhat older than the biblical Flood. The earliest known evidence of Egyptian hieroglyphic inscriptions appeared during the predynastic period on Naqada III pottery vessels, dated to about 3200 BC. But this should'nt be a suprise, because due to the evidence of rock carvings along the Nile terraces and in desert oases, in the 10th millennium BC, a culture of hunter-gatherers and fishers was replaced by a grain-grinding culture. Climate changes or overgrazing around 8000 BC began to desiccate the pastoral lands of Egypt, forming the Sahara. Early tribal peoples migrated to the Nile River where they developed a settled agricultural economy and more centralised society. So, how could ancient egyptians exist around 8000 BC, if the Bible says that there were no egyptians before 2370 BC ?
https://en.wikipedia.org/wiki/Egypt
http://mysteriousuniverse.org/2016/07/egypts-oldest-papyrus-reveals-lives-of-pyramid-builders/