suffragist (n.)

late 14c., "intercessory prayers or pleas on behalf of another," from Old French sofrage "plea, intercession" (13c.) and directly from Medieval Latin suffragium, from Latin suffragium "support, ballot, vote; right of voting; a voting tablet," from suffragari "lend support, vote for someone," conjectured to be a compound of sub "under" (see sub-) + fragor "crash, din, shouts (as of approval)," related to frangere "to break" (from PIE root *bhreg- "to break"). On another theory (Watkins, etc.) the second element is frangere itself and the notion is "use a broken piece of tile as a ballot" (compare ostracism).

The meaning "a vote for or against anything" is from 1530s. The meaning "political right to vote" in English is first found in the U.S. Constitution, 1787.

"female supporter of the cause of women's voting rights," 1906, from suffrage, with French fem. ending -ette, but not in the sense in which it was in vogue at the time.

suffragette. A more regrettable formation than others such as leaderette & flannelette, in that it does not even mean a sort of suffrage as they mean a sort of leader & of flannel, & therefore tends to vitiate the popular conception of the termination's meaning. The word itself may now be expected to die, having lost its importance; may its influence on word-making die with it! [Fowler, 1926]

Compare suffragist.