Able seaman Branz was a female Starfleet crewman who served during the late 23rd century. (Star Trek VI: The Undiscovered Country)
Branz' name comes from the name tag that was included along with several Starfleet uniform and accessory lots sold on It's A Wrap! sale and auction. [1] [2] [3]
She was played by one of several unknown actresses who served aboard either the USS Enterprise-A or USS Excelsior.