Was Amun the name of the first pharaoh?

No, Amun was not the name of the first pharaoh; he was an ancient Egyptian deity associated with creation and the sun. The first pharaoh of a unified Egypt is generally considered to be Narmer (also known as Menes), who ruled around 3100 BCE. Amun became a prominent god in later periods, particularly during the New Kingdom, when his cult gained significant influence.