Barons Clifden of Gowran, in the Peerage of Ireland (1776 to 1974)
Viscounts Clifden, in the Peerage of Ireland (1781 to 1974)
Barons Mendip, in the Peerage of Great Britain (1794, from 1802 to 1974)
Barons Dover, in the Peerage of the United Kingdom (1831, from 1833 to 1899)
Barons Robartes, in the Peerage of the United Kingdom (1869, from 1882 to 1974)
1st Viscount Clifden and 1st Baron Clifden of Gowran
- James Agar, 1st Viscount Clifden and 1st Baron Clifden of Gowran (1735–1788)
2nd to 5th Viscount Clifden
- Henry Welbore Ellis, 2nd Viscount Clifden and 2nd Baron Mendip (1761–1836)
- Henry Agar-Ellis, 3rd Viscount Clifden, 2nd Baron Mendip and 2nd Baron Dover (1825–1866)
- Henry George Agar-Ellis, 4th Viscount Clifden, 4th Baron Mendip and 3rd Baron Dover (1863–1895)
- Leopold George Frederick Agar-Ellis, 5th Viscount Clifden, 5th Baron Mendip and 4th Baron Dover (1829–1899)
6th to 8th Viscount Clifden
- Thomas Charles Agar-Robartes, 6th Viscount Clifden, 6th Baron Mendip and 2nd Baron Robartes (1844–1930)
- Francis Gerald Agar-Robartes, 7th Viscount Clifden, 7th Baron Mendip and 3rd Baron Robartes (1883–1966)
- Arthur Victor Agar-Robartes, 8th Viscount Clifden, 8th Baron Mendip and 4th Baron Robartes (1887–1974)
Barons Mendip, in the Peerage of Great Britain (1794 to 1974)
1st Baron Mendip
- Welbore Ellis, 1st Baron Mendip (1713–1802), peerage created in remainder to the three eldest sons of his sister Anne Ellis, wife of Henry Agar (which included James Agar, 1st Viscount Clifden and Charles Agar, 1st Earl of Normanton)
See above and below
Barons Dover, in the Peerage of the United Kingdom (1831 to 1899)
1st Baron Dover
- George James Welbore Agar-Ellis, 1st Baron Dover (1797–1833), only son of the second Viscount Clifden, the title passed to his eldest son, the second Baron. In 1836 he also succeeded his grandfather as third Viscount Clifden.
See above
Barons Robartes, in the Peerage of the United Kingdom (1869 to 1974)
1st Baron Robartes
- Thomas James Agar-Robartes, 1st Baron Robartes (1808–1882), son of Hon. Charles Bagenal-Agar, youngest son of James Agar, 1st Viscount Clifden. His mother was Anna Maria Hunt, great-niece and heiress of Henry Robartes, 3rd Earl of Radnor.
See above
Barons Somerton, in the Peerage of Ireland (1795)
Viscount Somerton, in the Peerage of Ireland (1800)
Earls of Normanton, in the Peerage of Ireland (1806)
Baron Somerton of Somerley, in the Peerage of the United Kingdom (1873)
Barons Mendip, in the Peerage of Great Britain (1794, from 1974)
1st to 5th Earl of Normanton
- Charles Agar, 1st Earl of Normanton (1736–1809), third son of Henry Agar of Gowran and Anne Ellis. James Agar, 1st Viscount Clifden was his elder brother and Welbore Ellis, 1st Baron Mendip his maternal uncle.
- Welbore Ellis Agar, 2nd Earl of Normanton (1778–1868)
- James Charles Herbert Welbore Ellis Agar, 3rd Earl of Normanton (1818–1896)
- Charles George Welbore Ellis Agar, Viscount Somerton (1858–1894)
- Sidney James Agar, 4th Earl of Normanton (1865–1933)
- Edward John Sidney Christian Welbore Ellis Agar, 5th Earl of Normanton (1910–1967)
6th Earl of Normanton and 9th Baron Mendip
- Shaun James Christian Welbore Ellis Agar, 6th Earl of Normanton and 9th Baron Mendip (b. 1945)
Countess of Brandon, in the Peerage of Ireland, for life only (1758)
Countess of Brandon
- Ellis Bermingham (Agar), Countess of Brandon (1708–1789), married firstly Theobald Bourke, 7th Viscount Mayo (d.1742) and married secondly Francis Bermingham, 14th Baron Athenry (1692–1750). She was the aunt of 1st Viscount Clifden and 1st Earl of Normanton.
Baron Callan, in the Peerage of Ireland (1790)
1st Baron Callan
- George Agar, 1st Baron Callan (1751 –1815), 1st cousin of 1st Viscount Clifden and 1st Earl of Normanton and nephew of the Countess of Brandon.
Barons Robartes, in the Peerage of England (1625 to 1757)
Earls of Radnor, in the Peerage of England (1679 to 1757)
Earls of Radnor
- Richard Robartes, 1st Baron Robartes (d. 1634)
- John Robartes, 1st Earl of Radnor and Viscount Bodmin, 2nd Baron Robartes (1606–1685)
- Charles Bodvile Robartes, 2nd Earl of Radnor (1660–1723)
- Henry Robartes, 3rd Earl of Radnor (1695–1741)
- John Robartes, 4th Earl of Radnor (1686–1757)