Keith Rockefeller was a 24th century Starfleet officer serving under Captain Kathryn Janeway aboard the USS Voyager.
In 2371, Rockefeller was among the crew stranded in the Delta Quadrant, when Voyager was forcefully brought there by the Caretaker.
Rockefeller's name appeared in the crew roster that was accessed by Harry Kim in early 2372. (VOY: "Non Sequitur")