William Wellesley-Pole, 3rd Earl of Mornington (1763–1845) William Pole-Tylney-Long-Wellesley, 4th Earl of Mornington (1788–1857) William Pole-Tylney-Long-Wellesley, 5th Earl of Mornington (1813–1863) The Hon. James Pole-Tylney-Long-Wellesley (1815–1851) Arthur Wellesley, 1st Duke of Wellington (1769–1852) See Line of succession
William Wellesley-Pole, 3rd Earl of Mornington (1763–1845), who married Katherine Forbes, daughter of Adm. Hon. John Forbes and Lady Mary Capell (a daughter of the 3rd Earl of Essex, in 1784. Francis Wellesley (1767–1770), who died in childhood.
Wellesley-Pole, William, (1763-1845), 3rd Earl of Mornington, statesman Westenra, Derrick Warner William, (1853-1921), 5th Baron Rossmore Westenra, Henry Robert, (1792-1860), 3rd Baron Rossmore