Den, also known as Hor-Den, Dewen, and Udimu, was the Horus name of a pharaoh of the Early Dynastic Period who ruled during the First Dynasty of Egypt. He is the best archaeologically-attested ruler of this period, credited with bringing prosperity to his realm. c. 3000 BC – 2920 BC; died at about 81. Alive at the same time as Qa'a. Wiki link