There is (that I know of) no such requirement in American custom. One does hear of a "Matron of Honor" as opposed to "Maid of Honor", but it is true that "bride

There is (that I know of) no such requirement in American custom. One does hear of a "Matron of Honor" as opposed to "Maid of Honor", but it is true that "bridesmaids and/or matrons" has an awkward sound.