The earliest non-Biblical account of the Exodus is in the writings of the Greek author Hecataeus of Abdera: the Egyptians blame a plague on foreigners and expel them from the country, whereupon Moses, their leader, takes them to Canaan, where he founds the city of Jerusalem.
Hecataeus wrote in the late 4th century BCE, but the passage is quite possibly an insertion made in the mid-1st century BCE. The most famous is by the Egyptian historian Manetho (3rd century BCE), known from two quotations by the 1st century CE Jewish historian Josephus. In the first, Manetho describes the Hyksos, their lowly origins in Asia, their dominion over and expulsion from Egypt, and their subsequent foundation of the city of Jerusalem and its temple.
Josephus (not Manetho) identifies the Hyksos with the Jews. In the second story Manetho tells how 80,000 lepers and other "impure people," led by a priest named Osarseph, join forces with the former Hyksos, now living in Jerusalem, to take over Egypt. They wreak havoc until eventually the pharaoh and his son chase them out to the borders of Syria, where Osarseph gives the lepers a law-code and changes his name to Moses. Manetho differs from the other writers in describing his renegades as Egyptians rather than Jews, and in using a name other than Moses for their leader, although the identification of Osarseph with Moses may be a later addition.
The Exodus - Wikipedia, the free encyclopedia