Keough, Keogh, Kehoe, O’Hoey, Hoy, Haughy, Haugh and MacKeogh are all derivatives of the Irish surname Mac Eochaidh. The 18th century produced two famous Protestant clergymen with the same name: The first John Keogh (1653-1725) was a mathematician while the second John Keogh (1681-1754) was a botanist and a zoologist. John Keogh (1740-1817) campaigned for Irish Catholics to get the vote and to repeal the Penal Laws. Shortly after the Battle of the Little Bighorn on June 25, 1876, the Army honored Keogh by naming Fort Keogh after him. The Keogh plan, a tax-deferred retirement plan designed to help self-employed workers, was named after U.S. Representative Eugene James Keogh, who came up with the idea in 1962.