Also our fathers. — Joseph had instructed them to add this (Genesis 46:34), because occupations were hereditary among the Egyptians, and thus Pharaoh would conclude that in their case also no change was possible in their mode of life.
Related Commentaries of Genesis 47:3
Genesis 47:3
3 And Pharaoh said unto his brethren, What is your occupation? And they said unto Pharaoh, Thy servants are shepherds, both we, and also our fathers.