Lieutenant Bill Thomas (also known as Wil Thoms) was a Human Starfleet officer in the 24th century.
In 2371, he was named as a crewmember of the USS Voyager in a crew manifest. (VOY: "Projections", crew manifest)
In 2372, he was named on a duty roster for the Planetary Geosciences Division. (VOY: "Parturition", okudagram)