Jeffery Joal Annon was a Human Starfleet officer in the mid-24th century.
In 2364, he held the rank of captain, and was the commanding officer of the USS Sherlock Holmes. In that year, prior to stardate 41775, he received a mission order about patrol assignments from Admiral Gregory Quinn of Starfleet Operational Support Services. (TNG: "Conspiracy")
The character was never mentioned in dialog; his name came from a mission order.