There were lieutenants of counties in Ireland until the reign of James II, when they were renamed governors.
[1] The office of Lord Lieutenant was recreated on 23 August 1831.
Deputy lieutenants support the work of the lord-lieutenant.
There can be several deputy lieutenants at any time, depending on the population of the county.
Their appointment does not terminate with the changing of the lord-lieutenant, but they usually retire at age 75.