Lieutenant Rogelio Kelowitz was a human Starfleet officer assigned to the USS Enterprise in the 2260s as a tactical officer. In 2266, Kelowitz accompanied a fifteen-man survey team to Tlaoli IV. (TOS - The Janus Gate novel: Present Tense)
- TOS novel: Present Tense
- TOS episode: "The Galileo Seven"
- TOS episode: "Arena" / TNG novel: Requiem
- TOS episode: "This Side of Paradise"
- TOS novel: A Choice of Catastrophes