C. Graffeo was a Starfleet officer in the 23rd century.
In 2285, he was a captain assigned to the Starfleet Academy's Starfleet Training Command. He was a Beam Technology instructor. His office, located on the second level of a building, was room #209. His rank, name, position, and office were listed on a directory placard. (Star Trek II: The Wrath of Khan, set artwork)
He was named after set decorator Charles M. Graffeo. The placard was sold on It's A Wrap! sale and auction for US$31.99. [1]