Kirok was the persona adopted by James T. Kirk, while suffering from amnesia, as he lived among the American Indian population on Amerind.
As he had first been seen by the natives when exiting the Preservers' obelisk, and having shortly thereafter resuscitated a young boy who was thought to have drowned, Kirok was believed to be a god and became medicine chief instead of Salish. He also married the tribal priestess Miramanee, as per custom. The name "Kirok" was the result of a near-miss attempt by Kirk to remember his own name shortly after the onset of the amnesia. (TOS: "The Paradise Syndrome")