Our wedding had mixed attendants, and IIRC we just called them attendants (except for the matron of honor and best man, and I think we may have called my brother's husband, the only boy on the bride's side, the stud).

t /not helpful

But of the choices on offer, I'd prefer groomswoman, as woman is a nice neutral descriptor for a grown-up female person, whereas maid is a little less neutral and has more ick potential.

I was my sister's Best Woman. Which was nice. She also had bridesmaids, though.

Back in the late '80s, I had a coworker who had her best (male) friend as her main attendee; they called him the Dude of Honor.

"Sweet!"

Wait, what are the male attendants called, traditionally (on the groom's side)? My mind has gone totally blank.

groomsmen

Oh my god, I was drawing a total blank! (Yes, despite the use just a few posts above of "groomsmaid" and "groomswoman.") I need more caffeine.

Or ushers.

"That's it! You're off the usher list!"

t /Spike

We're calling ours Committee Members.