Original Appearances: Star Trek Generations (1994)
Other Appearances: None that I'm aware of.
Biography: In the year 2293, James T. Kirk is lost and presumed dead when the Enterprise-B is exposed to a strange energy ribbon (the Nexus). In 2371, Captain Jean-Luc Picard also enters the Nexus with Dr. Tolian Soran. Within the nexus, Picard meets Kirk, who has Butler, horses, and Antonia. Picard convinces Kirk that this is not real, and the two Enterprise captains battle and defeat Soran. According to an article on the Star Trek website, the real Butler had died in 2286. Since Kirk had been long retired at the time he disappeared into the Nexus, presumably Kirk acquired Butler after retiring.
Group Affiliation: None
Miscellaneous: One would presume that the cabin and Antonia both came from Kirk's past as well, brought to “life” by the Nexus.