John Trimble was a Starfleet officer in the 24th century. He was a commander in 2364. Before stardate 41547.3, according to an order sent by Admiral Kathryn Trimble of Starfleet Operational Support Services, he was to be transferred from the USS Equicon. (TNG: "Conspiracy", okudagram)
This character was only mentioned in writing. Named after the husband of Bjo Trimble.