On 17 February 1980, the Derrynaflan hoard was discovered about two miles east of Horse and Jockey, on an island of dry land in Liskeveen bog which was known locally as "the Gobán Saors island".
Although the village now has the official Irish name of An Marcach, this is merely a translation of the modern colloquial English name, The Jockey, an abbreviation of the official name in English.