# Baron O'Neill

Baron O'Neill, of Shane's Castle in the County of Antrim, is a title in the Peerage of the United Kingdom. It was created in 1868 for the musical composer The Reverend William O'Neill. Born William Chichester, he succeeded to the estates of his cousin John Bruce Richard O'Neill, 3rd Viscount O'Neill, in 1855 (on whose death the viscountcy and first barony of O'Neill became extinct) and assumed by royal licence the surname of O'Neill in lieu of Chichester in order to inherit the lands of his cousin, despite not being descended in the male line from an O'Neill. The Chichesters trace their lineage to the name O'Neill through Mary Chichester, daughter of Henry O'Neill of Shane's Castle. Lord O'Neill was the patrilineal great-great-great-grandson of John Chichester, younger brother of Arthur Chichester, 2nd Earl of Donegall. The latter two were both nephews of Arthur Chichester, 1st Earl of Donegall, and grandsons of Edward Chichester, 1st Viscount Chichester (see the Marquess of Donegall for more information). Lord O'Neill was succeeded by his eldest son, the second Baron. He sat as a Conservative Member of Parliament for Antrim.
His eldest son and heir apparent, the Hon. Arthur O'Neill, represented Antrim Mid in the House of Commons as a Conservative from 1910 until 1914, when he was killed in action during the First World War, the first MP to die in the conflict. The second Baron was therefore succeeded by his grandson, Shane O'Neill, 3rd Baron O'Neill (the son of the Hon. Arthur O'Neill). He was killed in action in Italy during the Second World War. The title is currently held by his son, the fourth Baron, who succeeded in 1944. He was Lord Lieutenant of Antrim from 1994 to 2008.
Two other members of the O'Neill family have been elevated to the peerage. Hugh O'Neill, 1st Baron Rathcavan, was the youngest son of the second Baron O'Neill, while Terence O'Neill, Baron O'Neill of the Maine, Prime Minister of Northern Ireland, was the youngest brother of the third Baron.
The holders of the O'Neill and Rathcavan baronies are in the remainder of the titles Earl of Donagall, Viscount Chichester and Baron Chichester, though the chances of that happening are very slim.
The family seat is Shane's Castle, near Randalstown, County Antrim.

## Baron O'Neill (1868)

* William O'Neill, 1st Baron O'Neill (1813–1883)
* Edward O'Neill, 2nd Baron O'Neill (1839–1928)
* Shane Edward Robert O'Neill, 3rd Baron O'Neill (1907–1944)
* Raymond Arthur Clanaboy O'Neill, 4th Baron O'Neill (born 1933)
The heir apparent is the present holder's son, the Hon. Shane Sebastian Clanaboy O'Neill (born 1965).

### Title succession chart

vteTitle succession chart, Barons Chichester (both creations), Templemore, O'Neill and Rathcavan, Viscounts Chichester, Earls of Donegall, and Marquesses of Donegall. :
| | | | | | | Sir John Chichester died 1569 | Sir John Chichester died 1569 | Sir John Chichester died 1569 | Sir John Chichester died 1569 | Sir John Chichester died 1569 | Sir John Chichester died 1569 |
| Baron Chichester (1613) | Baron Chichester (1613) | Baron Chichester (1613) | Baron Chichester (1613) | Baron Chichester (1613) | Baron Chichester (1613) | Baron Chichester Viscount Chichester (both 1625) | Baron Chichester Viscount Chichester (both 1625) | Baron Chichester Viscount Chichester (both 1625) | Baron Chichester Viscount Chichester (both 1625) | Baron Chichester Viscount Chichester (both 1625) | Baron Chichester Viscount Chichester (both 1625) |
| Baron Chichester (1613) | Baron Chichester (1613) | Baron Chichester (1613) | Baron Chichester (1613) | Baron Chichester (1613) | Baron Chichester (1613) | Baron Chichester Viscount Chichester (both 1625) | Baron Chichester Viscount Chichester (both 1625) | Baron Chichester Viscount Chichester (both 1625) | Baron Chichester Viscount Chichester (both 1625) | Baron Chichester Viscount Chichester (both 1625) | Baron Chichester Viscount Chichester (both 1625) | Arthur Chichester 1st Baron Chichester 1563–1625 | Arthur Chichester 1st Baron Chichester 1563–1625 | Arthur Chichester 1st Baron Chichester 1563–1625 | Arthur Chichester 1st Baron Chichester 1563–1625 | Arthur Chichester 1st Baron Chichester 1563–1625 | Arthur Chichester 1st Baron Chichester 1563–1625 | | | Edward Chichester 1st Viscount Chichester 1st Baron Chichester 1568–1648 | Edward Chichester 1st Viscount Chichester 1st Baron Chichester 1568–1648 | Edward Chichester 1st Viscount Chichester 1st Baron Chichester 1568–1648 | Edward Chichester 1st Viscount Chichester 1st Baron Chichester 1568–1648 | Edward Chichester 1st Viscount Chichester 1st Baron Chichester 1568–1648 | Edward Chichester 1st Viscount Chichester 1st Baron Chichester 1568–1648 |
| 1613 barony extinct | 1613 barony extinct | 1613 barony extinct | 1613 barony extinct | 1613 barony extinct | 1613 barony extinct | | | | | | | Arthur Chichester 1st Baron Chichester 1563–1625 | Arthur Chichester 1st Baron Chichester 1563–1625 | Arthur Chichester 1st Baron Chichester 1563–1625 | Arthur Chichester 1st Baron Chichester 1563–1625 | Arthur Chichester 1st Baron Chichester 1563–1625 | Arthur Chichester 1st Baron Chichester 1563–1625 | | | Edward Chichester 1st Viscount Chichester 1st Baron Chichester 1568–1648 | Edward Chichester 1st Viscount Chichester 1st Baron Chichester 1568–1648 | Edward Chichester 1st Viscount Chichester 1st Baron Chichester 1568–1648 | Edward Chichester 1st Viscount Chichester 1st Baron Chichester 1568–1648 | Edward Chichester 1st Viscount Chichester 1st Baron Chichester 1568–1648 | Edward Chichester 1st Viscount Chichester 1st Baron Chichester 1568–1648 | | | | | | | | | | | | | | | | | | |
| | | | | | | Earl of Donegall (1647) | Earl of Donegall (1647) | Earl of Donegall (1647) | Earl of Donegall (1647) | Earl of Donegall (1647) | Earl of Donegall (1647) | | | | | | | | | | | | | | | | | | | | |
| | | | | | | Earl of Donegall (1647) | Earl of Donegall (1647) | Earl of Donegall (1647) | Earl of Donegall (1647) | Earl of Donegall (1647) | Earl of Donegall (1647) | | | | | | | | | | | | | | | | | | | | | | | Arthur Chichester 1st Earl of Donegall 1606–1675 | Arthur Chichester 1st Earl of Donegall 1606–1675 | Arthur Chichester 1st Earl of Donegall 1606–1675 | Arthur Chichester 1st Earl of Donegall 1606–1675 | Arthur Chichester 1st Earl of Donegall 1606–1675 | Arthur Chichester 1st Earl of Donegall 1606–1675 | | | | | | | | | | | | | | | | | | | | | Lt. Col. John Chichester 1609–1647 | Lt. Col. John Chichester 1609–1647 | Lt. Col. John Chichester 1609–1647 | Lt. Col. John Chichester 1609–1647 | Lt. Col. John Chichester 1609–1647 | Lt. Col. John Chichester 1609–1647 |
| | | | | | | Hon. Williaṃ Chichester died 1660 | Hon. Williaṃ Chichester died 1660 | Hon. Williaṃ Chichester died 1660 | Hon. Williaṃ Chichester died 1660 | Hon. Williaṃ Chichester died 1660 | Hon. Williaṃ Chichester died 1660 | | | Arthur Chichester 2nd Earl of Donegall died 1678 | Arthur Chichester 2nd Earl of Donegall died 1678 | Arthur Chichester 2nd Earl of Donegall died 1678 | Arthur Chichester 2nd Earl of Donegall died 1678 | Arthur Chichester 2nd Earl of Donegall died 1678 | Arthur Chichester 2nd Earl of Donegall died 1678 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Hon. John Chichester | Hon. John Chichester | Hon. John Chichester | Hon. John Chichester | Hon. John Chichester | Hon. John Chichester |
| | | | | | | | | | | | | | | Arthur Chichester 3rd Earl of Donegall 1666–1706 | Arthur Chichester 3rd Earl of Donegall 1666–1706 | Arthur Chichester 3rd Earl of Donegall 1666–1706 | Arthur Chichester 3rd Earl of Donegall 1666–1706 | Arthur Chichester 3rd Earl of Donegall 1666–1706 | Arthur Chichester 3rd Earl of Donegall 1666–1706 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rev. William Chichester | Rev. William Chichester | Rev. William Chichester | Rev. William Chichester | Rev. William Chichester | Rev. William Chichester | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | Arthur Chichester 4th Earl of Donegall 1695–1757 | Arthur Chichester 4th Earl of Donegall 1695–1757 | Arthur Chichester 4th Earl of Donegall 1695–1757 | Arthur Chichester 4th Earl of Donegall 1695–1757 | Arthur Chichester 4th Earl of Donegall 1695–1757 | Arthur Chichester 4th Earl of Donegall 1695–1757 | | | Hon. John Chichester 1700–1746 | Hon. John Chichester 1700–1746 | Hon. John Chichester 1700–1746 | Hon. John Chichester 1700–1746 | Hon. John Chichester 1700–1746 | Hon. John Chichester 1700–1746 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rev. Arthur Chichester | Rev. Arthur Chichester | Rev. Arthur Chichester | Rev. Arthur Chichester | Rev. Arthur Chichester | Rev. Arthur Chichester |
| | | | | | | | | | | | | | | Baron Fisherwick (1790, GB) Marquess of Donegall (1791) | Baron Fisherwick (1790, GB) Marquess of Donegall (1791) | Baron Fisherwick (1790, GB) Marquess of Donegall (1791) | Baron Fisherwick (1790, GB) Marquess of Donegall (1791) | Baron Fisherwick (1790, GB) Marquess of Donegall (1791) | Baron Fisherwick (1790, GB) Marquess of Donegall (1791) | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | Baron Fisherwick (1790, GB) Marquess of Donegall (1791) | Baron Fisherwick (1790, GB) Marquess of Donegall (1791) | Baron Fisherwick (1790, GB) Marquess of Donegall (1791) | Baron Fisherwick (1790, GB) Marquess of Donegall (1791) | Baron Fisherwick (1790, GB) Marquess of Donegall (1791) | Baron Fisherwick (1790, GB) Marquess of Donegall (1791) | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Arthur Chichester 1st Marquess of Donegall 5th Earl of Donegall 1739–1799 | Arthur Chichester 1st Marquess of Donegall 5th Earl of Donegall 1739–1799 | Arthur Chichester 1st Marquess of Donegall 5th Earl of Donegall 1739–1799 | Arthur Chichester 1st Marquess of Donegall 5th Earl of Donegall 1739–1799 | Arthur Chichester 1st Marquess of Donegall 5th Earl of Donegall 1739–1799 | Arthur Chichester 1st Marquess of Donegall 5th Earl of Donegall 1739–1799 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rev. William Chichester died 1815 | Rev. William Chichester died 1815 | Rev. William Chichester died 1815 | Rev. William Chichester died 1815 | Rev. William Chichester died 1815 | Rev. William Chichester died 1815 |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Chichester baronetcy (1821, UK) | Chichester baronetcy (1821, UK) | Chichester baronetcy (1821, UK) | Chichester baronetcy (1821, UK) | Chichester baronetcy (1821, UK) | Chichester baronetcy (1821, UK) | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Chichester baronetcy (1821, UK) | Chichester baronetcy (1821, UK) | Chichester baronetcy (1821, UK) | Chichester baronetcy (1821, UK) | Chichester baronetcy (1821, UK) | Chichester baronetcy (1821, UK) | | | | | | | | | | | | | | | | | | | | | George Chichester 2nd Marquess of Donegall 1769–1844 | George Chichester 2nd Marquess of Donegall 1769–1844 | George Chichester 2nd Marquess of Donegall 1769–1844 | George Chichester 2nd Marquess of Donegall 1769–1844 | George Chichester 2nd Marquess of Donegall 1769–1844 | George Chichester 2nd Marquess of Donegall 1769–1844 | | | | | | | | | | | | | | | Hon. Arthur Chichester 1771–1788 | Hon. Arthur Chichester 1771–1788 | Hon. Arthur Chichester 1771–1788 | Hon. Arthur Chichester 1771–1788 | Hon. Arthur Chichester 1771–1788 | Hon. Arthur Chichester 1771–1788 | | | | | | | | | | | | | | | Lord Spencer Chichester 1775–1819 | Lord Spencer Chichester 1775–1819 | Lord Spencer Chichester 1775–1819 | Lord Spencer Chichester 1775–1819 | Lord Spencer Chichester 1775–1819 | Lord Spencer Chichester 1775–1819 | | | Sir Arthur Chichester 1st Baronet c. 1769 – 1847 | Sir Arthur Chichester 1st Baronet c. 1769 – 1847 | Sir Arthur Chichester 1st Baronet c. 1769 – 1847 | Sir Arthur Chichester 1st Baronet c. 1769 – 1847 | Sir Arthur Chichester 1st Baronet c. 1769 – 1847 | Sir Arthur Chichester 1st Baronet c. 1769 – 1847 | | | Rev. Edward Chichester died 1840 | Rev. Edward Chichester died 1840 | Rev. Edward Chichester died 1840 | Rev. Edward Chichester died 1840 | Rev. Edward Chichester died 1840 | Rev. Edward Chichester died 1840 |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Baronetcy extinct | Baronetcy extinct | Baronetcy extinct | Baronetcy extinct | Baronetcy extinct | Baronetcy extinct | | | | | | | | | | | | | | | | | | | | | George Chichester 2nd Marquess of Donegall 1769–1844 | George Chichester 2nd Marquess of Donegall 1769–1844 | George Chichester 2nd Marquess of Donegall 1769–1844 | George Chichester 2nd Marquess of Donegall 1769–1844 | George Chichester 2nd Marquess of Donegall 1769–1844 | George Chichester 2nd Marquess of Donegall 1769–1844 | | | | | | | | | | | | | | | Hon. Arthur Chichester 1771–1788 | Hon. Arthur Chichester 1771–1788 | Hon. Arthur Chichester 1771–1788 | Hon. Arthur Chichester 1771–1788 | Hon. Arthur Chichester 1771–1788 | Hon. Arthur Chichester 1771–1788 | | | | | | | | | | | | | | | Lord Spencer Chichester 1775–1819 | Lord Spencer Chichester 1775–1819 | Lord Spencer Chichester 1775–1819 | Lord Spencer Chichester 1775–1819 | Lord Spencer Chichester 1775–1819 | Lord Spencer Chichester 1775–1819 | | | Sir Arthur Chichester 1st Baronet c. 1769 – 1847 | Sir Arthur Chichester 1st Baronet c. 1769 – 1847 | Sir Arthur Chichester 1st Baronet c. 1769 – 1847 | Sir Arthur Chichester 1st Baronet c. 1769 – 1847 | Sir Arthur Chichester 1st Baronet c. 1769 – 1847 | Sir Arthur Chichester 1st Baronet c. 1769 – 1847 | | | Rev. Edward Chichester died 1840 | Rev. Edward Chichester died 1840 | Rev. Edward Chichester died 1840 | Rev. Edward Chichester died 1840 | Rev. Edward Chichester died 1840 | Rev. Edward Chichester died 1840 |
| | | | | | | Baron Ennishowen and Carrickfergus (1841, UK) | Baron Ennishowen and Carrickfergus (1841, UK) | Baron Ennishowen and Carrickfergus (1841, UK) | Baron Ennishowen and Carrickfergus (1841, UK) | Baron Ennishowen and Carrickfergus (1841, UK) | Baron Ennishowen and Carrickfergus (1841, UK) | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Baron Templemore (1831, UK) | Baron Templemore (1831, UK) | Baron Templemore (1831, UK) | Baron Templemore (1831, UK) | Baron Templemore (1831, UK) | Baron Templemore (1831, UK) | | | | | | | Baron O'Neill (1868, UK) | Baron O'Neill (1868, UK) | Baron O'Neill (1868, UK) | Baron O'Neill (1868, UK) | Baron O'Neill (1868, UK) | Baron O'Neill (1868, UK) |
| | | | | | | Baron Ennishowen and Carrickfergus (1841, UK) | Baron Ennishowen and Carrickfergus (1841, UK) | Baron Ennishowen and Carrickfergus (1841, UK) | Baron Ennishowen and Carrickfergus (1841, UK) | Baron Ennishowen and Carrickfergus (1841, UK) | Baron Ennishowen and Carrickfergus (1841, UK) | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Baron Templemore (1831, UK) | Baron Templemore (1831, UK) | Baron Templemore (1831, UK) | Baron Templemore (1831, UK) | Baron Templemore (1831, UK) | Baron Templemore (1831, UK) | | | | | | | Baron O'Neill (1868, UK) | Baron O'Neill (1868, UK) | Baron O'Neill (1868, UK) | Baron O'Neill (1868, UK) | Baron O'Neill (1868, UK) | Baron O'Neill (1868, UK) | | | | | | | | | George Chichester 3rd Marquess of Donegall 1797–1883 | George Chichester 3rd Marquess of Donegall 1797–1883 | George Chichester 3rd Marquess of Donegall 1797–1883 | George Chichester 3rd Marquess of Donegall 1797–1883 | George Chichester 3rd Marquess of Donegall 1797–1883 | George Chichester 3rd Marquess of Donegall 1797–1883 | | | Edward Chichester 4th Marquess of Donegall 1799–1889 | Edward Chichester 4th Marquess of Donegall 1799–1889 | Edward Chichester 4th Marquess of Donegall 1799–1889 | Edward Chichester 4th Marquess of Donegall 1799–1889 | Edward Chichester 4th Marquess of Donegall 1799–1889 | Edward Chichester 4th Marquess of Donegall 1799–1889 | Lord Spencer Chichester 1805–1825 | Lord Spencer Chichester 1805–1825 | Lord Spencer Chichester 1805–1825 | Lord Spencer Chichester 1805–1825 | Lord Spencer Chichester 1805–1825 | Lord Spencer Chichester 1805–1825 | Lord Arthur Chichester 1808–1840 | Lord Arthur Chichester 1808–1840 | Lord Arthur Chichester 1808–1840 | Lord Arthur Chichester 1808–1840 | Lord Arthur Chichester 1808–1840 | Lord Arthur Chichester 1808–1840 | | | Lord Haṃilton Chichester 1810–1854 | Lord Haṃilton Chichester 1810–1854 | Lord Haṃilton Chichester 1810–1854 | Lord Haṃilton Chichester 1810–1854 | Lord Haṃilton Chichester 1810–1854 | Lord Haṃilton Chichester 1810–1854 | Lord John Chichester 1811–1873 | Lord John Chichester 1811–1873 | Lord John Chichester 1811–1873 | Lord John Chichester 1811–1873 | Lord John Chichester 1811–1873 | Lord John Chichester 1811–1873 | Lord Stephen Chichester 1814–1890 | Lord Stephen Chichester 1814–1890 | Lord Stephen Chichester 1814–1890 | Lord Stephen Chichester 1814–1890 | Lord Stephen Chichester 1814–1890 | Lord Stephen Chichester 1814–1890 | | | Arthur Chichester 1st Baron Templemore 1797–1837 | Arthur Chichester 1st Baron Templemore 1797–1837 | Arthur Chichester 1st Baron Templemore 1797–1837 | Arthur Chichester 1st Baron Templemore 1797–1837 | Arthur Chichester 1st Baron Templemore 1797–1837 | Arthur Chichester 1st Baron Templemore 1797–1837 | | | | | | | | | | | William O'Neill 1st Baron O'Neill (né Chichester) 1813–1883 | William O'Neill 1st Baron O'Neill (né Chichester) 1813–1883 | William O'Neill 1st Baron O'Neill (né Chichester) 1813–1883 | William O'Neill 1st Baron O'Neill (né Chichester) 1813–1883 | William O'Neill 1st Baron O'Neill (né Chichester) 1813–1883 | William O'Neill 1st Baron O'Neill (né Chichester) 1813–1883 |
| | | | | | | Ennishowen and Carrickfergus barony extinct | Ennishowen and Carrickfergus barony extinct | Ennishowen and Carrickfergus barony extinct | Ennishowen and Carrickfergus barony extinct | Ennishowen and Carrickfergus barony extinct | Ennishowen and Carrickfergus barony extinct | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | George Chichester 3rd Marquess of Donegall 1797–1883 | George Chichester 3rd Marquess of Donegall 1797–1883 | George Chichester 3rd Marquess of Donegall 1797–1883 | George Chichester 3rd Marquess of Donegall 1797–1883 | George Chichester 3rd Marquess of Donegall 1797–1883 | George Chichester 3rd Marquess of Donegall 1797–1883 | | | Edward Chichester 4th Marquess of Donegall 1799–1889 | Edward Chichester 4th Marquess of Donegall 1799–1889 | Edward Chichester 4th Marquess of Donegall 1799–1889 | Edward Chichester 4th Marquess of Donegall 1799–1889 | Edward Chichester 4th Marquess of Donegall 1799–1889 | Edward Chichester 4th Marquess of Donegall 1799–1889 | Lord Spencer Chichester 1805–1825 | Lord Spencer Chichester 1805–1825 | Lord Spencer Chichester 1805–1825 | Lord Spencer Chichester 1805–1825 | Lord Spencer Chichester 1805–1825 | Lord Spencer Chichester 1805–1825 | Lord Arthur Chichester 1808–1840 | Lord Arthur Chichester 1808–1840 | Lord Arthur Chichester 1808–1840 | Lord Arthur Chichester 1808–1840 | Lord Arthur Chichester 1808–1840 | Lord Arthur Chichester 1808–1840 | | | Lord Haṃilton Chichester 1810–1854 | Lord Haṃilton Chichester 1810–1854 | Lord Haṃilton Chichester 1810–1854 | Lord Haṃilton Chichester 1810–1854 | Lord Haṃilton Chichester 1810–1854 | Lord Haṃilton Chichester 1810–1854 | Lord John Chichester 1811–1873 | Lord John Chichester 1811–1873 | Lord John Chichester 1811–1873 | Lord John Chichester 1811–1873 | Lord John Chichester 1811–1873 | Lord John Chichester 1811–1873 | Lord Stephen Chichester 1814–1890 | Lord Stephen Chichester 1814–1890 | Lord Stephen Chichester 1814–1890 | Lord Stephen Chichester 1814–1890 | Lord Stephen Chichester 1814–1890 | Lord Stephen Chichester 1814–1890 | | | Arthur Chichester 1st Baron Templemore 1797–1837 | Arthur Chichester 1st Baron Templemore 1797–1837 | Arthur Chichester 1st Baron Templemore 1797–1837 | Arthur Chichester 1st Baron Templemore 1797–1837 | Arthur Chichester 1st Baron Templemore 1797–1837 | Arthur Chichester 1st Baron Templemore 1797–1837 | | | | | | | | | | | William O'Neill 1st Baron O'Neill (né Chichester) 1813–1883 | William O'Neill 1st Baron O'Neill (né Chichester) 1813–1883 | William O'Neill 1st Baron O'Neill (né Chichester) 1813–1883 | William O'Neill 1st Baron O'Neill (né Chichester) 1813–1883 | William O'Neill 1st Baron O'Neill (né Chichester) 1813–1883 | William O'Neill 1st Baron O'Neill (né Chichester) 1813–1883 |
| George Chichester Viscount Chichester 1826–1827 | George Chichester Viscount Chichester 1826–1827 | George Chichester Viscount Chichester 1826–1827 | George Chichester Viscount Chichester 1826–1827 | George Chichester Viscount Chichester 1826–1827 | George Chichester Viscount Chichester 1826–1827 | Frederick Chichester Earl of Belfast 1827–1853 | Frederick Chichester Earl of Belfast 1827–1853 | Frederick Chichester Earl of Belfast 1827–1853 | Frederick Chichester Earl of Belfast 1827–1853 | Frederick Chichester Earl of Belfast 1827–1853 | Frederick Chichester Earl of Belfast 1827–1853 | | | George Chichester 5th Marquess of Donegall 1822–1904 | George Chichester 5th Marquess of Donegall 1822–1904 | George Chichester 5th Marquess of Donegall 1822–1904 | George Chichester 5th Marquess of Donegall 1822–1904 | George Chichester 5th Marquess of Donegall 1822–1904 | George Chichester 5th Marquess of Donegall 1822–1904 | | | Lord Henry Chichester 1834–1928 | Lord Henry Chichester 1834–1928 | Lord Henry Chichester 1834–1928 | Lord Henry Chichester 1834–1928 | Lord Henry Chichester 1834–1928 | Lord Henry Chichester 1834–1928 | Lord Adolphus Chichester 1836–1901 | Lord Adolphus Chichester 1836–1901 | Lord Adolphus Chichester 1836–1901 | Lord Adolphus Chichester 1836–1901 | Lord Adolphus Chichester 1836–1901 | Lord Adolphus Chichester 1836–1901 | | | | | | | | | | | Harry Chichester 2nd Baron Templemore 1821–1906 | Harry Chichester 2nd Baron Templemore 1821–1906 | Harry Chichester 2nd Baron Templemore 1821–1906 | Harry Chichester 2nd Baron Templemore 1821–1906 | Harry Chichester 2nd Baron Templemore 1821–1906 | Harry Chichester 2nd Baron Templemore 1821–1906 | | | | | | | Edward O'Neill 2nd Baron O'Neill 1839–1928 | Edward O'Neill 2nd Baron O'Neill 1839–1928 | Edward O'Neill 2nd Baron O'Neill 1839–1928 | Edward O'Neill 2nd Baron O'Neill 1839–1928 | Edward O'Neill 2nd Baron O'Neill 1839–1928 | Edward O'Neill 2nd Baron O'Neill 1839–1928 |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | O'Neill baronetcy (1929, UK) Baron Rathcavan (1953, UK) | O'Neill baronetcy (1929, UK) Baron Rathcavan (1953, UK) | O'Neill baronetcy (1929, UK) Baron Rathcavan (1953, UK) | O'Neill baronetcy (1929, UK) Baron Rathcavan (1953, UK) | O'Neill baronetcy (1929, UK) Baron Rathcavan (1953, UK) | O'Neill baronetcy (1929, UK) Baron Rathcavan (1953, UK) |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | O'Neill baronetcy (1929, UK) Baron Rathcavan (1953, UK) | O'Neill baronetcy (1929, UK) Baron Rathcavan (1953, UK) | O'Neill baronetcy (1929, UK) Baron Rathcavan (1953, UK) | O'Neill baronetcy (1929, UK) Baron Rathcavan (1953, UK) | O'Neill baronetcy (1929, UK) Baron Rathcavan (1953, UK) | O'Neill baronetcy (1929, UK) Baron Rathcavan (1953, UK) | | | | | | | | | | | | | | | Edward Chichester 6th Marquess of Donegall 1903–1975 | Edward Chichester 6th Marquess of Donegall 1903–1975 | Edward Chichester 6th Marquess of Donegall 1903–1975 | Edward Chichester 6th Marquess of Donegall 1903–1975 | Edward Chichester 6th Marquess of Donegall 1903–1975 | Edward Chichester 6th Marquess of Donegall 1903–1975 | Severne Chichester 1861–1951 | Severne Chichester 1861–1951 | Severne Chichester 1861–1951 | Severne Chichester 1861–1951 | Severne Chichester 1861–1951 | Severne Chichester 1861–1951 | | | Forester Chichester 1864–1865 | Forester Chichester 1864–1865 | Forester Chichester 1864–1865 | Forester Chichester 1864–1865 | Forester Chichester 1864–1865 | Forester Chichester 1864–1865 | Robert Chichester 1873–1921 | Robert Chichester 1873–1921 | Robert Chichester 1873–1921 | Robert Chichester 1873–1921 | Robert Chichester 1873–1921 | Robert Chichester 1873–1921 | Augustus Chichester 1878–1902 | Augustus Chichester 1878–1902 | Augustus Chichester 1878–1902 | Augustus Chichester 1878–1902 | Augustus Chichester 1878–1902 | Augustus Chichester 1878–1902 | | | | | | | | | | | Arthur Chichester 3rd Baron Templemore 1854–1924 | Arthur Chichester 3rd Baron Templemore 1854–1924 | Arthur Chichester 3rd Baron Templemore 1854–1924 | Arthur Chichester 3rd Baron Templemore 1854–1924 | Arthur Chichester 3rd Baron Templemore 1854–1924 | Arthur Chichester 3rd Baron Templemore 1854–1924 | | | William O'Neill 1874–1882 | William O'Neill 1874–1882 | William O'Neill 1874–1882 | William O'Neill 1874–1882 | William O'Neill 1874–1882 | William O'Neill 1874–1882 | Capt. Hon. Arthur O'Neill 1876–1914 | Capt. Hon. Arthur O'Neill 1876–1914 | Capt. Hon. Arthur O'Neill 1876–1914 | Capt. Hon. Arthur O'Neill 1876–1914 | Capt. Hon. Arthur O'Neill 1876–1914 | Capt. Hon. Arthur O'Neill 1876–1914 | Hugh O'Neill 1st Baron Rathcavan 1st Baronet 1883–1982 | Hugh O'Neill 1st Baron Rathcavan 1st Baronet 1883–1982 | Hugh O'Neill 1st Baron Rathcavan 1st Baronet 1883–1982 | Hugh O'Neill 1st Baron Rathcavan 1st Baronet 1883–1982 | Hugh O'Neill 1st Baron Rathcavan 1st Baronet 1883–1982 | Hugh O'Neill 1st Baron Rathcavan 1st Baronet 1883–1982 |
| | | | | | | | | | | | | | | Titles inherited by the 5th Baron Templemore | Titles inherited by the 5th Baron Templemore | Titles inherited by the 5th Baron Templemore | Titles inherited by the 5th Baron Templemore | Titles inherited by the 5th Baron Templemore | Titles inherited by the 5th Baron Templemore | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Edward Chichester 6th Marquess of Donegall 1903–1975 | Edward Chichester 6th Marquess of Donegall 1903–1975 | Edward Chichester 6th Marquess of Donegall 1903–1975 | Edward Chichester 6th Marquess of Donegall 1903–1975 | Edward Chichester 6th Marquess of Donegall 1903–1975 | Edward Chichester 6th Marquess of Donegall 1903–1975 | Severne Chichester 1861–1951 | Severne Chichester 1861–1951 | Severne Chichester 1861–1951 | Severne Chichester 1861–1951 | Severne Chichester 1861–1951 | Severne Chichester 1861–1951 | | | Forester Chichester 1864–1865 | Forester Chichester 1864–1865 | Forester Chichester 1864–1865 | Forester Chichester 1864–1865 | Forester Chichester 1864–1865 | Forester Chichester 1864–1865 | Robert Chichester 1873–1921 | Robert Chichester 1873–1921 | Robert Chichester 1873–1921 | Robert Chichester 1873–1921 | Robert Chichester 1873–1921 | Robert Chichester 1873–1921 | Augustus Chichester 1878–1902 | Augustus Chichester 1878–1902 | Augustus Chichester 1878–1902 | Augustus Chichester 1878–1902 | Augustus Chichester 1878–1902 | Augustus Chichester 1878–1902 | | | | | | | | | | | Arthur Chichester 3rd Baron Templemore 1854–1924 | Arthur Chichester 3rd Baron Templemore 1854–1924 | Arthur Chichester 3rd Baron Templemore 1854–1924 | Arthur Chichester 3rd Baron Templemore 1854–1924 | Arthur Chichester 3rd Baron Templemore 1854–1924 | Arthur Chichester 3rd Baron Templemore 1854–1924 | | | William O'Neill 1874–1882 | William O'Neill 1874–1882 | William O'Neill 1874–1882 | William O'Neill 1874–1882 | William O'Neill 1874–1882 | William O'Neill 1874–1882 | Capt. Hon. Arthur O'Neill 1876–1914 | Capt. Hon. Arthur O'Neill 1876–1914 | Capt. Hon. Arthur O'Neill 1876–1914 | Capt. Hon. Arthur O'Neill 1876–1914 | Capt. Hon. Arthur O'Neill 1876–1914 | Capt. Hon. Arthur O'Neill 1876–1914 | Hugh O'Neill 1st Baron Rathcavan 1st Baronet 1883–1982 | Hugh O'Neill 1st Baron Rathcavan 1st Baronet 1883–1982 | Hugh O'Neill 1st Baron Rathcavan 1st Baronet 1883–1982 | Hugh O'Neill 1st Baron Rathcavan 1st Baronet 1883–1982 | Hugh O'Neill 1st Baron Rathcavan 1st Baronet 1883–1982 | Hugh O'Neill 1st Baron Rathcavan 1st Baronet 1883–1982 |
| | | | | | | | | | | | | | | Titles inherited by the 5th Baron Templemore | Titles inherited by the 5th Baron Templemore | Titles inherited by the 5th Baron Templemore | Titles inherited by the 5th Baron Templemore | Titles inherited by the 5th Baron Templemore | Titles inherited by the 5th Baron Templemore | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Robert Chichester 1902–1920 | Robert Chichester 1902–1920 | Robert Chichester 1902–1920 | Robert Chichester 1902–1920 | Robert Chichester 1902–1920 | Robert Chichester 1902–1920 | | | | | | | | | | | | | | | | | Arthur Chichester 4th Baron Templemore 1880–1953 | Arthur Chichester 4th Baron Templemore 1880–1953 | Arthur Chichester 4th Baron Templemore 1880–1953 | Arthur Chichester 4th Baron Templemore 1880–1953 | Arthur Chichester 4th Baron Templemore 1880–1953 | Arthur Chichester 4th Baron Templemore 1880–1953 | | | | | | | | | Shane O'Neill 3rd Baron O'Neill 1907–1944 | Shane O'Neill 3rd Baron O'Neill 1907–1944 | Shane O'Neill 3rd Baron O'Neill 1907–1944 | Shane O'Neill 3rd Baron O'Neill 1907–1944 | Shane O'Neill 3rd Baron O'Neill 1907–1944 | Shane O'Neill 3rd Baron O'Neill 1907–1944 | Phelim O'Neill 2nd Baron Rathcavan 1909–1994 | Phelim O'Neill 2nd Baron Rathcavan 1909–1994 | Phelim O'Neill 2nd Baron Rathcavan 1909–1994 | Phelim O'Neill 2nd Baron Rathcavan 1909–1994 | Phelim O'Neill 2nd Baron Rathcavan 1909–1994 | Phelim O'Neill 2nd Baron Rathcavan 1909–1994 |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Maj. Hon. Arthur Chichester 1914–1942 | Maj. Hon. Arthur Chichester 1914–1942 | Maj. Hon. Arthur Chichester 1914–1942 | Maj. Hon. Arthur Chichester 1914–1942 | Maj. Hon. Arthur Chichester 1914–1942 | Maj. Hon. Arthur Chichester 1914–1942 | Dermot Chichester 7th Marquess of Donegall 5th Baron Templemore 1916–2007 | Dermot Chichester 7th Marquess of Donegall 5th Baron Templemore 1916–2007 | Dermot Chichester 7th Marquess of Donegall 5th Baron Templemore 1916–2007 | Dermot Chichester 7th Marquess of Donegall 5th Baron Templemore 1916–2007 | Dermot Chichester 7th Marquess of Donegall 5th Baron Templemore 1916–2007 | Dermot Chichester 7th Marquess of Donegall 5th Baron Templemore 1916–2007 | | | | | | | Raymond O'Neill 4th Baron O'Neill born 1933 | Raymond O'Neill 4th Baron O'Neill born 1933 | Raymond O'Neill 4th Baron O'Neill born 1933 | Raymond O'Neill 4th Baron O'Neill born 1933 | Raymond O'Neill 4th Baron O'Neill born 1933 | Raymond O'Neill 4th Baron O'Neill born 1933 | | | Hugh O'Neill 3rd Baron Rathcavan born 1939 | Hugh O'Neill 3rd Baron Rathcavan born 1939 | Hugh O'Neill 3rd Baron Rathcavan born 1939 | Hugh O'Neill 3rd Baron Rathcavan born 1939 | Hugh O'Neill 3rd Baron Rathcavan born 1939 | Hugh O'Neill 3rd Baron Rathcavan born 1939 |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Patrick Chichester 8th Marquess of Donegall born 1952 | Patrick Chichester 8th Marquess of Donegall born 1952 | Patrick Chichester 8th Marquess of Donegall born 1952 | Patrick Chichester 8th Marquess of Donegall born 1952 | Patrick Chichester 8th Marquess of Donegall born 1952 | Patrick Chichester 8th Marquess of Donegall born 1952 | | | | | | | Hon. Shane O'Neill born 1965 | Hon. Shane O'Neill born 1965 | Hon. Shane O'Neill born 1965 | Hon. Shane O'Neill born 1965 | Hon. Shane O'Neill born 1965 | Hon. Shane O'Neill born 1965 | | | Hon. François O'Neill born 1984 | Hon. François O'Neill born 1984 | Hon. François O'Neill born 1984 | Hon. François O'Neill born 1984 | Hon. François O'Neill born 1984 | Hon. François O'Neill born 1984 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | James Chichester Earl of Belfast born 1990 | James Chichester Earl of Belfast born 1990 | James Chichester Earl of Belfast born 1990 | James Chichester Earl of Belfast born 1990 | James Chichester Earl of Belfast born 1990 | James Chichester Earl of Belfast born 1990 | | | | | | | Con O'Neill born 2000 | Con O'Neill born 2000 | Con O'Neill born 2000 | Con O'Neill born 2000 | Con O'Neill born 2000 | Con O'Neill born 2000 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |