My "best man" is a woman. What do I call her?
Most couples choose to call a female "best man" on the groom’s side a "best woman." Of course, you can call her whatever you and the best woman feel most comfortable using: honor attendant, woman of honor or best gal. This person usually stands next to the groom, signs the marriage license and wears something signaling their honor role (anything from dresses similar to the bridesmaids or a sleek suit in the wedding colors).