" The people who lived along the Nile were called Egyptians. Early in Egypt’s history, there were two Egyptian tribes who lived along the Nile. The Egyptians who lived in the north, in the Nile Delta, were called the “Lower Egyptians.” The Egyptians who lived along the straight part of the river, further south, were called the “Upper Egyptians. "

― Susan Wise Bauer , Ancient Times: From the Earliest Nomads to the Last Roman Emperor (The Story of the World #1)