Genesis 41:50-52

50Now two sons were born to Joseph before the years of famine came, whom Asenath, the daughter of Potiphera, priest of On, bore to him.

51Joseph named the firstborn Manasseh (causing to forget), for he said, “God has made me forget all my trouble and hardship and all [the sorrow of the loss of] my father’s household.”

52He named the second [son] Ephraim (fruitfulness), for “God has caused me to be fruitful and very successful in the land of my suffering.”