Earl of Devonshire in 1603. Barons Mountjoy of Mountjoy Fort (1618) and Mountjoy of Thurveston (1627) Mountjoy Blount, 1st Baron Mountjoy (1597–1665), created Earl of Newport during 1628. see Earl of Newport. Barons Mountjoy (1712) see Viscount Windsor. Barons Mountjoy (1789) Luke Gardiner, 1st Baron Mountjoy (1745–1798), was created Baron Mountjoy during 1789 and Viscount Mountjoy during 1795, both part of the peerage of Ireland. see Viscount Mountjoy. See also Earl of Blessington Earl of Newport Viscount Mountjoy References External links 1465 establishments in England Extinct baronies in the Peerage of England Extinct baronies in the Peerage of Ireland Extinct baronies in the Peerage of Great Britain Noble titles created in 1465 Noble titles created in 1712 Noble titles created in 1789