From H1121 (ben) and H3225 (yamin). Jacob's youngest son, born to Rachel. Originally named Ben-oni ('son of my sorrow') by dying Rachel, renamed Benjamin by Jacob.
Binyamin carries powerful renaming theology. Rachel's dying name was overruled by Jacob's prophetic name: 'son of the right hand' — honor and power. The right hand is blessing (Genesis 48:14), authority (Psalm 110:1), salvation (Psalm 138:7). Benjamin's tribe produced King Saul and the apostle Paul. God transforms identity: what begins in sorrow is redeemed as strength.