Kyle McKenna was a male human helm officer assigned to the USS Enterprise in the year 2258 of an alternate reality.
He had a sister named Amy McKenna. (TOS comic: "Red Level Down")
In 2255, McKenna served as helmsman on the USS Farragut during the Starfleet Academy Zeta Fleet Training Exercise. (TOS - Starfleet Academy novel: The Gemini Agent)
In 2258, McKenna fell ill with lungworms on the date of the Enterprise's maiden voyage and was replaced by Hikaru Sulu. (TOS movie: Star Trek)