James T. Kirk/Alternate timelines/UEF Enterprise

In the alternate timeline created where Khan Noonien Singh was killed by the Romulan Sera, Kirk was born on the , and was (still) the brother of George Samuel Kirk, who had died sometime prior to 2259. 
Kirk once claimed he spent six months in a Denobulan prison with a Vulcan cellmate. He learned the Vulcan neck pinch from this person, as well as how to make Plomeek soup in a toilet. 
He joined the United Earth Fleet and by 2259, was captain of the . After La'an Noonien-Singh was transported aboard his ship from the prime timeline, Kirk was inadvertently brought back in time with her to 2022 Toronto, the point of divergence between their two timelines. Although initially skeptical of her intention to restore her timeline, he was persuaded to help her when he learned that not only was Earth a paradise, but that Sam was still alive. As they attempted to prevent history from being changed, Kirk was killed by the Romulan temporal agent Sera, before La'an succeeded in restoring the original timeline. ()