c.1380, "prayers or pleas on behalf of another," from O.Fr. suffrage (13c.), from M.L. suffragium, from L. suffragium "support, vote, right of voting," from suffragari "lend support, vote for someone," from sub "under" + fragor "crash, din, shouts (as of approval)," related to frangere "to break" (see fraction). The meaning "right to vote" is first found in the U.S. Constitution, 1787.