Aaron was the traditional founder and head of the israelite priesthood, who, with his brother moses, led the israelites out of egypt.The figure of aaron as it is now found in the pentateuch, the first five …We read that “moses was eighty years old, and aaron was eighty-three years old when they spoke to pharaoh,” 1 which tells us that aaron was older than moses by three years.(it also tells us that it is …Aaron, the brother of moses and miriam, is a prominent figure in the hebrew bible, serving as the first high priest of israel.He was born into the tribe of levi, the son of amram and jochebed (exodus 6:20).