Gen 41:50-52

50Before the years of famine came, Joseph had two sons, whom Asenath daughter of Potiphera, priest of On, bore to him.51Joseph named the firstborn Manasseh, “For,” he said, “God has made me forget all my hardship and all my father's house.”52The second he named Ephraim, “For God has made me fruitful in the land of my misfortunes.”