Origin: 1150–1200; (noun) Middle English ransoun < Old French rançon < Late Latin redēmptiōn- (stem of redēmptiō) redemption; (v.) Middle English ransounen < Old French rançonner, derivative of rançon
early 13c., "sum paid for the release of a prisoner or captured man," from O.Fr. ranson (Fr. rançon), earlier raenson "ransom, redemption," from L. redemptionem (nom. redemptio) "a redeeming," from redimere (see redeem). The verb is first recorded c.1300.