Maid of Honor
The bestie.
Best Man
The best friend.
Bridesman
The other bestie.
Groomsman
The former roommate and friend (the latter title still current).
Bridesmaid
The college roomie.
Groomswoman
That's fam.
Bridesmaid
The sister-in-law.
Groomsman
The Road Dog.
Bridesmaid
The niece and wild child.
Groomsman
The World's Uncle.
Honor Attendant
The bride's cousin: giving her away on behalf of her late father, Keith, and the Cardwell family.
Officiant and Goofball