| | | | John Chichester d. 1569 |
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| Baron Chichester (1st creation), 1613 | | Viscount Chichester and Baron Chichester (2nd creation), 1625 |
Arthur Chichester 1563–1625 Baron Chichester | | Edward Chichester 1568–1648 1st Viscount Chichester, etc. |
| Barony chichester (1st creation) extinct, 1625 | | | | | | | | | | | | | | | | | | | | | | |
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| | | | Earl of Donegall, 1647 | | | | | | | | | | | | | | | | |
| | | | Arthur Chichester 1606–1675 1st Earl of Donegall, etc. | | | | | | | | | | | | | | John Chichester 1609–1647 |
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| | | | Williaṃ Chichester d. 1660 | | Arthur Chichester d. 1678 2nd Earl of Donegall, etc. | | | | | | | | | | | | | | | | | | | | | | | | | | John Chichester |
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| | | | | | | | Arthur Chichester 1666–1706 3rd Earl of Donegall, etc. | | | | | | | | | | | | | | | | | | | | | | | | | | Rev. William Chichester |
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| | | | Arthur Chichester 1695–1757 4th Earl of Donegall, etc. | | John Chichester 1700–1746 | | | | | | | | | | | | | | | | | | | | | | | | | | Arthur Chichester |
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| | | | | | | | Baron Fisherwick, 1790 (GB) Marquess of Donegall and Earl of Belfast, 1791 | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | Arthur Chichester 1739–1799 1st Marquess of Donegall, etc., 5th Earl of Donegall, etc. | | | | | | | | | | | | | | | | | | | | | | | | | | Rev. William Chichester d. 1815 |
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| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Chichester baronetcy (UK), 1821 | | | | |
| | | | | | | | George Chichester 1769–1844 2nd Marquess of Donegall, etc., 6th Earl of Donegall, etc. | | | | | | | | | | Arthur Chichester 1771–1788 | | | | | | | | | | Spencer Chichester 1775–1819 | | Arthur Chichester 1st Baronet c. 1769–1847 | | Edward Chichester d. 1840 |
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| | | | Baron Ennishowen and Carrickfergus (UK) 1841 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Baron Templemore (UK), 1831 | | | | | | Baron O'Neill (UK), 1868 |
| | | | George Chichester 1797–1883 3rd Marquess of Donegall, etc., 7th Earl of Donegall, etc. | | Edward Chichester 1799–1889 4th Marquess of Donegall, etc., 8th Earl of Donegall, etc. | | Spencer Chichester 1805–1825 | | Arthur Chichester 1808–1840 | | Haṃilton Chichester 1810–1854 | | John Chichester 1811–1873 | | Stephen Chichester 1814–1890 | | Arthur Chichester 1797–1837 1st Baron Templemore | | | | | | William (Chichester) O'Neill 1813–1883 1st Baron O'Neill |
| | | | Ennishowen and Carrickfergus barony extinct, 1883 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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George Chichester styled Viscount Chichester 1826–1827 | | Frederick Chichester styled Earl of Belfast 1827–1853 | | George Chichester 1822–1904 5th Marquess of Donegall, etc., 9th Earl of Donegall, etc. | | Henry Chichester 1834–1928 | | | | | | Adolphus Chichester 1836–1901 | | | | | | | | | | Harry Chichester 1821–1906 2nd Baron Templemore | | | | | | Edward O'Neill 1839–1928 2nd Baron O'Neill |
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| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Baronet of Cleggan (UK), 1929 Baron Rathcavan (UK), 1953 |
| | | | | | | | Edward Chichester 1903–1975 6th Marquess of Donegall, etc., 10th Earl of Donegall, etc. | | Severne Chichester 1861–1951 | | Forester Chichester 1864–1865 | | Robert Chichester 1873–1921 | | Augustus Chichester 1878–1902 | | | | | | Arthur Chichester 1854–1924 3rd Baron Templemore | | Arthur O'Neill 1876–1914 | | Hugh O'Neill 1883–1982 1st Baron Rathcavan, etc. |
| | | | | | | | Titles inherited by the 5th Baron Templemore | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | Robert Chichester 1902–1920 | | | | | | | | | | Arthur Chichester 1880–1953 4th Baron Templemore | | Shane O'Neill 1907–1944 3rd Baron O'Neill | | Phelim O'Neill 1909–1994 2nd Baron Rathcavan, etc. |
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| | | | | | | | | | | | | | | | | | | | | | | | | | | | Arthur Chichester 1914–1942 | | Dermot Chichester 1916–2007 7th Marquess of Donegall, etc. 11th Earl of Donegall, etc., 5th Baron Templemore | | Raymond O'Neill b. 1933 4th Baron O'Neill | | Hugh O'Neill 1939–2025 3rd Baron Rathcavan, etc. |
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| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Patrick Chichester b. 1952 8th Marquess of Donegall, etc., 12th Earl of Donegall, etc., 6th Baron Templemore | | Shane O'Neill b. 1965 | | François O'Neill b. 1984 4th Baron Rathcavan, etc. |
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| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | James Chichester styled Earl of Belfast b. 1990 | | Con O'Neill b. 2000 | | Tyrone O'Neill b. 2023 |