1st Duke of Wellington etc. "The Iron Duke"
Barons Mornington in the Peerage of Ireland (1746)
Earls of Mornington in the Peerage of Ireland (1760)
Baron Wellesley in the Peerage of Great Britain (1797-1842)
Marquesses Wellesley in the Peerage of Ireland (1799-1842)
Earls of Mornington
- Richard Wesley, 1st Baron Mornington (1690–1758)
- Garret Wesley, 1st Earl of Mornington, Viscount Wellesley, 2nd Baron Mornington (1735–1781)
1st Marquess Wellesley KG
- Richard Wellesley, 1st Marquess Wellesley, 2nd Earl of Mornington, 1st Baron Wellesley KG (1760–1842)
Barons Maryborough in the Peerage of Ireland (1821-1863)
Barons Mornington in the Peerage of Ireland (1746, from 1842)
Earls of Mornington in the Peerage of Ireland (1760, from 1842)
William Wellesley-Pole when 1st Baron Maryborough
- William Wellesley-Pole, 3rd Earl of Mornington, 1st Baron Maryborough (1763–1845), second son of Garret Wesley, 1st Earl of Mornington and in 1781, in accordance with the will William Pole (d.1781), of Ballyfin in Ireland, his godfather, he changed his name to Wesley-Pole. Pole was descended from Peryam Pole, 3rd son of Sir William Pole (1561-1635) and brother of Sir John Pole, 1st Baronet (c.1589-1658).
4th Earl of Mornington
- William Pole-Tylney-Long-Wellesley, 4th Earl of Mornington (1788–1857) assumed the additional surnames of Tylney-Long in 1812, upon his marriage with Catherine, daughter and co-heiress of Sir James Tylney-Long, 7th Baronet, of Draycot, Wiltshire.
- William Richard Arthur Pole-Tylney-Long-Wellesley, 5th Earl of Mornington (1813–1863)
Long, later Tylney-Long of Westminster in the Baronetage of England (1662-1805)
Tylney-Long of Westminster
- Sir Robert Long, 1st Baronet (1598-1673)
- Sir James Long, 2nd Baronet (1617-1692)
- Sir Robert Long, 3rd Baronet (1673-1692)
- Sir Giles Long, 4th Baronet (1675-1698)
- Sir James Long, 5th Baronet (1682-1729)
- Sir Robert Long, 6th Baronet (1705-1767) married Lady Emma, daughter of Richard Tylney, 1st Earl Tylney
- Sir James Tylney-Long, 7th Baronet (1736-1794)
- Sir James Tylney-Long, 8th Baronet (1794-1805)
Viscount Wellington in the Peerage of the United Kingdom (1809)
Earl of Wellington in the Peerage of the United Kingdom (1812)
Marquess of Wellington in the Peerage of the United Kingdom (1812)
Duque de Ciudad Rodrigo in Spain (1812)
Duque da Vitória in Portugal (1812)
Dukes of Wellington in the Peerage of the United Kingdom (1814)
Prins van Waterloo in the Netherlands (1815)
Barons Mornington in the Peerage of Ireland (1746, from 1863)
Earls of Mornington in the Peerage of Ireland (1760, from 1863)
Dukes of Wellington
- Arthur Wellesley, 1st Duke of Wellington, Marquess Douro, 1st Duke of Ciudad Rodrigo, 1st Duke of Vitória, 1st Prince of Waterloo, 1st Marquess of Wellington, 1st Earl of Wellington, 1st Viscount Wellington, 1st Viscount Wellington, Baron Douro KG (1769-1852), fourth son of Garret Wesley, 1st Earl of Mornington.
- Arthur Richard Wellesley, 2nd Duke of Wellington, 2nd Duke of Ciudad Rodrigo, 6th Earl of Mornington KG (1807–1884)
- Henry Wellesley, 3rd Duke of Wellington, 3rd Duke of Ciudad Rodrigo (1846–1900)
- Arthur Charles Wellesley, 4th Duke of Wellington, 4th Duke of Ciudad Rodrigo KG (1849–1934)
- Arthur Charles Wellesley, 5th Duke of Wellington, 5th Duke of Ciudad Rodrigo (1876–1941)
- Henry Valerian George Wellesley, 6th Duke of Wellington, 6th Duke of Ciudad Rodrigo (1912–1943)
- Anne Maud Rhys, 7th Duchess of Ciudad Rodrigo (1910 – 1998)
- Gerald Wellesley, 7th Duke of Wellington, 8th Duke of Ciudad Rodrigo KG (1885–1972)
- Arthur Valerian Wellesley, 8th Duke of Wellington, 9th Duke of Ciudad Rodrigo KG (1915-2014)
- Arthur Charles Valerian Wellesley, 9th Duke of Wellington, 10th Duke of Ciudad Rodrigo (b.1945)
Barons Cowley in the Peerage of the United Kingdom (1828)
Earls Cowley in the Peerage of the United Kingdom (1857)
Earls Cowley
- Henry Wellesley, 1st Baron Cowley (1773–1847) fifth son of Garret Wesley, 1st Earl of Mornington.
- Henry Richard Charles Wellesley, 1st Earl Cowley, Viscount Dangan, 2nd Baron Cowley KG (1804–1884)
- William Henry Wellesley, 2nd Earl Cowley (1834–1895)
- Henry Arthur Mornington Wellesley, 3rd Earl Cowley (1866–1919)
- Christian Arthur Wellesley, 4th Earl Cowley (1890–1962)
- Denis Arthur Wellesley, 5th Earl Cowley (1921–1968)
- Richard Francis Wellesley, 6th Earl Cowley (1946–1975)
- Garret Graham Wellesley, 7th Earl Cowley (b. 1934)