redeemer

(noun) a teacher and prophet born in Bethlehem and active in Nazareth; his life and sermons form the basis for Christianity (circa 4 BC - AD 29). Synonyms: Jesus, Jesus of Nazareth, the Nazarene, Jesus Christ, Christ, Savior, Saviour, Good Shepherd, Redeemer, Deliverer.

(noun) someone who redeems or buys back (promissory notes or merchandise or commercial paper etc.).