Ike Clanton was a 19th century human gunman who was involved in the shootout at the O.K. Corral on October 26th, 1881. Ike was one of two survivors on the losing side of the duel.
In 2268, James T. Kirk was identified as Ike Clanton in a bizzare recreation of the duel created by the Melkot. (TOS: "Spectre of the Gun")