bridesman

A male friend or companion of the bridegroom, having various ceremonial duties at a wedding.

It was customary, in those days, for the bride's-man and maiden, and a few select friends, to visit the newly married couple after they had retired to rest […].

According to him, on the following Thursday, the bridesmen, numbering “six, eight, even ten or more,” rode on horseback with four wagons to get the bride.

A male bridesmaid; a man who attends a bride during her wedding ceremony, as part of the wedding party.

She might be renting a tux, however, as she is willing to have a bridesman.