Barons Bessborough of Bessborough in the Peerage of Ireland (1721)
Viscounts Duncannon in the Peerage of Ireland (1723)
Earls of Bessborough in the Peerage of Ireland (1739)
Barons Ponsonby of Sysonby in the Peerage of Great Britain (1749)
Barons Duncannon of Bessborough in the Peerage of the United Kingdom (1834)
Earls of Bessborough in the Peerage of the United Kingdom (1937)
Earls of Bessborough
- William Ponsonby, 1st Viscount Duncannon, 1st Baron Bessborough of Bessborough (1659–1724)
- Brabazon Ponsonby, 1st Earl of Bessborough, 2nd Viscount Duncannon, 1st Baron Ponsonby of Sysonby (1679–1758)
- William Ponsonby, 2nd Earl of Bessborough (1704–1793)
- Frederick Ponsonby, 3rd Earl of Bessborough (1758–1844)
- John William Ponsonby, 4th Earl of Bessborough, 1st Baron Duncannon of Bessborough (1781–1847)
- John George Brabazon Ponsonby, 5th Earl of Bessborough (1809–1880)
- Frederick George Brabazon Ponsonby, 6th Earl of Bessborough (1815–1895)
- Walter William Brabazon Ponsonby, 7th Earl of Bessborough (1821–1906)
- Edward Ponsonby, 8th Earl of Bessborough KP (1851–1920)
- Vere Brabazon Ponsonby, 9th Earl of Bessborough, 1st Earl of Bessborough (1880–1956)
- Frederick Edward Neuflize Ponsonby, 10th Earl of Bessborough, (1913–1993)
- Arthur Mountifort Longfield Ponsonby, 11th Earl of Bessborough (1912–2002)
- Myles Fitzhugh Longfield Ponsonby, 12th Earl of Bessborough (born 1941)
Barons Ponsonby of Imokilly in the Peerage of the United Kingdom (1806-1866)
Viscounts Ponsonby in the Peerage of the United Kingdom (1839-1855)
Barons Ponsonby of Imokilly
- William Ponsonby, 1st Baron Ponsonby (1744–1806) eldest son of the Honourable John Ponsonby, second son of Brabazon Ponsonby, 1st Earl of Bessborough.
- John Ponsonby, 1st Viscount Ponsonby, 2nd Baron Ponsonby (c. 1770–1855)
- William Ponsonby, 3rd Baron Ponsonby (1816–1861)
- William Brabazon Ponsonby, 4th Baron Ponsonby (1807–1866)
Barons de Mauley in the Peerage of the United Kingdom (1838)
Barons de Mauley
- William Francis Spencer Ponsonby, 1st Baron de Mauley (1787–1855) third son of Frederick Ponsonby, 3rd Earl of Bessborough. He married Barbara, only daughter and heir of Anthony Ashley Cooper, 5th Earl of Shaftesbury, and co heir of the ancient Barony of De Mauley.
- Charles Frederick Ashley Cooper Ponsonby, 2nd Baron de Mauley (1815–1896)
- William Ashley Webb Ponsonby, 3rd Baron de Mauley (1843–1918)
- Maurice John George Ponsonby, 4th Baron de Mauley (1846–1945)
- Hubert William Ponsonby, 5th Baron de Mauley (1878–1962)
- Gerald John Ponsonby, 6th Baron de Mauley (1921–2002)
- Rupert Charles Ponsonby, 7th Baron de Mauley (born 1957)
Barons Sysonby in the Peerage of the United Kingdom (1935-2009)
Barons Sysonby
- Frederick Edward Grey Ponsonby, 1st Baron Sysonby (1867–1935) second son of Sir Henry Ponsonby, grandson of Frederick Ponsonby, 3rd Earl of Bessborough.
- Edward Gaspard Ponsonby, 2nd Baron Sysonby (1903–1956)
- John Frederick Ponsonby, 3rd Baron Sysonby (1945–2009)
Barons Ponsonby of Shulbrede in the Peerage of the United Kingdom (1930)
Barons Ponsonby of Shulbrede
- Arthur Augustus William Harry Ponsonby, 1st Baron Ponsonby of Shulbrede (1871–1946) third second son of Sir Henry Ponsonby, grandson of Frederick Ponsonby, 3rd Earl of Bessborough.
- Matthew Henry Hubert Ponsonby, 2nd Baron Ponsonby of Shulbrede (1904–1976)
- Thomas Arthur Ponsonby, 3rd Baron Ponsonby of Shulbrede (1930–1990)
- Frederick Matthew Thomas Ponsonby, 4th Baron Ponsonby of Shulbrede (b. 1958)
Ponsonby of Wootton in the Baronetage of the United Kingdom (1956)
Ponsonby of Wootton
- Sir Charles Edward Ponsonby, 1st Baronet (1879–1976) son of the Hon. Edwin Charles William Ponsonby, fifth son of Charles Ponsonby, 2nd Baron de Mauley.
- Sir Ashley Charles Gibbs Ponsonby, 2nd Baronet (1921–2010)
- Sir Charles Ashley Ponsonby, 3rd Baronet (born 1951)