Play as Egyptians. When you get to the Mythic Age, choose Osiris as the Minor 
God. When you get the improvements and god power, click on the "New Kingdom" 
improvement. Wait for the second Pharaoh to be generated, then use Son of 
Osiris god power on the second Pharaoh. You will get another Pharaoh in a 
few moments and you will then have one Son of Osiris and two Pharaohs