D. Gabrielle

From Memory Alpha, the free Star Trek reference

D. Gabrielle was a 23rd century Starfleet commander attached to the Starfleet Academy's Starfleet Training Command. Gabrielle served as instructor for inter-stellar ethnology.

In 2285, Gabrielle was listed on a directory placard found on the 2nd level of Starfleet Training Command. (Star Trek II: The Wrath of Khan)