Exodus 1:8 - Albert Barnes' Notes on the Bible

The expressions in this verse are special and emphatic. “A new king” is a phrase not found elsewhere. It is understood by most commentators to imply that he did not succeed his predecessor in the natural order of descent and inheritance. He “arose up over Egypt,” occupying the land, as it would seem, on different terms from the king whose place he took, either by usurpation or conquest. The fact that he knew not Joseph implies a complete separation from the traditions of Lower Egypt. At present the generality of Egyptian scholars identify this Pharaoh with Rameses II, but all the conditions of the narrative are fulfilled in the person of Amosis I (or, Aahmes), the head of the 18th Dynasty. He was the descendant of the old Theban sovereigns, but his family was tributary to the Dynasty of the Shepherds, the Hyksos of Manetho, then ruling in the North of Egypt. Amosis married an Ethiopian princess, and in the third year of his reign captured Avaris, or Zoan, the capital of the Hyksos, and completed the expulsion of that race.