Narmer is the likely first pharaoh of a unified Egypt. He may also be the same person as Menes, who is also associated as the first pharaoh to unify Egypt. Narmer was likely the succesor of Ka, or Scorpion II. Narmer is also considered to be the founder of the 1st Dynasty of Egypt.
The exact date of Narmer's reign is almost impossible to define. Based off of radiocarbon dating, his reign is given to have started between 3273 BCE - 2987 BCE.