Hebrew Sar Shalom. One of the four throne-names of the coming Davidic king in Isaiah 9:6: Wonderful Counselor, Mighty God, Everlasting Father, Prince of Peace. Sar is "prince, captain, ruler," and shalom means not mere absence of conflict but integrated wholeness — right relationship with God, self, neighbor, and creation all at once. The title therefore describes both who He is (the bringer of cosmic wholeness) and what His reign produces (a kingdom in which the wolf dwells with the lamb, Isaiah 11:6).
Christ's peace is not the world's peace. The Pax Romana was peace through conquest; the modern therapeutic peace is peace through feelings management. Christ's peace is peace with God first (Romans 5:1 — "having been justified by faith, we have peace with God through our Lord Jesus Christ"), then peace of God garrisoning the heart (Philippians 4:7), then peace among reconciled enemies (Ephesians 2:14 — "He Himself is our peace, who has made us both one"). Paul calls Him our peace; He did not merely negotiate peace, He is peace embodied. The Prince of Peace was crucified to make peace — "making peace by the blood of His cross" (Colossians 1:20). His peace begins at the cross, expands through the Spirit, and is consummated when the Prince returns and every weapon of war becomes obsolete.