Brown Driver Briggs

 Israel = "God prevails"
1. the second name for Jacob given to him by God after his wrestling
with the angel at Peniel
2. the name of the descendants and the nation of the descendants of Jacob
  1) the name of the nation until the death of Solomon and the split
  2) the name used and given to the northern kingdom consisting of
the 10 tribes under Jeroboam; the southern kingdom was known as
Judah
  3) the name of the nation after the return from exile