The Earl holds the subsidiary title of Baron Devlin (1486).
Earls of Westmeath (1621) Richard Nugent, 1st Earl of Westmeath (1583-1642) Richard Nugent, 2nd Earl of Westmeath (1621-1684) Richard Nugent, 3rd Earl of Westmeath (d.1714) Thomas Nugent, 4th Earl of Westmeath (1669-1752) John Nugent, 5th Earl of Westmeath (1671-1754) Thomas Nugent, 6th Earl of Westmeath (1714-1792) George Frederick Nugent, 7th Earl of Westmeath (1760-1814) George Thomas John Nugent, 1st Marquess of Westmeath, 8th Earl of Westmeath (1785-1871) Anthony Francis Nugent, 9th Earl of Westmeath (1805-1879) William St George Nugent, 10th Earl of Westmeath (1832-1883) Anthony Francis Nugent, 11th Earl of Westmeath (1870-1933) Gilbert Charles Nugent, 12th Earl of Westmeath (1880-1971) William Anthony Nugent, 13th Earl of Westmeath (b. 1928)
