Tribe of Ephraim: Descended from Joseph's Second Son Adopted by Jacob

And the second son he named Ephraim, saying, “God has made me fruitful in the land of my affliction.”

And now your two sons born to you in Egypt before I came to you here shall be reckoned as mine; Ephraim and Manasseh shall be mine, just as Reuben and Simeon are mine.