| | | | | | | | Baron Power, of Curraghmore, 1535 |
| | | | | | | | Richard Power d. 1539 1st Baron Power, of Curraghmore |
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| | | | Piers Power d. 1545 2nd Baron Power, of Curraghmore | | John Power 1516–1592 3rd Baron Power, of Curraghmore |
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| | | | | | | | Richard Power d. 1607 4th Baron Power, of Curraghmore |
| Baronet 'of Coleraine', in the County of Londonderry, 1665 | | | | | | | | | |
Tristram Beresford d. 1673 1st Baronet | | | | | | John Power d. 1661 5th Baron Power, of Curraghmore |
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| | | | | | | | | Earl of Tyrone and Viscount Decies (2nd creation), 1673 |
Randal Beresford d. 1681 2nd Baronet | | | | | | Richard Power 1630–1690 1st Earl of Tyrone and Viscount Decies, 6th Baron Power |
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Tristram Beresford 1669–1701 3rd Baronet | | John Power c. 1665–1693 2nd Earl of Tyrone and Viscount Decies, 7th Baron Power | | James Power 1667–1704 3rd Earl of Tyrone and Viscount Decies, 8th Baron Power |
| | | | | | | | | Heir to the Barony of Tyrone outlawed, 1688 and extinct, 1704 Earldom of Tyrone (2nd creation) and Viscount Decies extinct, 1704 |
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Viscount Tyrone and Baron Beresford (1st creation), of Beresford, in the County of Cavan, 1720 Earl of Tyrone (3rd creation), 1746 | | | | | | Baron La Poer retrospectively granted, 1767 |
Marcus Beresford 1694–1763 1st Earl of Tyrone, Viscount Tyrone, and Baron Beresford of Beresford, 4th Baronet | | | | | | Katherine Power d. 1769 Baroness La Poer |
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Baron Tyrone, 1786 Marquess of Waterford, 1789 | | | | | | | | | | | | | | Baron Decies, of Decies in the County of Waterford, 1812 |
George Beresford 1735–1800 1st Marquess of Waterford and Baron Tyrone, 2nd Earl of Tyrone, Viscount Tyrone, and Baron Beresford of Beresford, Baron La Poer, 5th Baronet | | | | | | | | | | | | | | William Beresford, 1st Baron Decies 1743–1819 1st Baron Decies |
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| | | | | | | | | Beresford, later Beresford-Peirse baronets of Bagnall, 1814 | | Baron Beresford (2nd creation), of Albuera and Dungarvan in the County of Waterford, 1814 Viscount Beresford, of Beresford in the County of Stafford, 1823 | | | | | | | | | | |
Henry Beresford 1772–1826 2nd Marquess of Waterford and Baron Tyrone, 3rd Earl of Tyrone, Viscount Tyrone, and Baron Beresford of Beresford, Baron La Poer, 6th Baronet | | | | | | John Poo Beresford 1766–1844 1st Baronet of Bagnall | | William Carr Beresford 1768–1854 1st Viscount Beresford and Baron Beresford of Albuera and Dungarvan | | Louisa Beresford d. 1851 | | John Horsley-Beresford 1774–1865 2nd Baron Decies |
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| | | | | | | | | | | | | | | Viscountcy Beresford and Barony Beresford of Albuera and Dungarvan extinct, 1844 | | | | | | | | | |
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Henry Beresford 1811–1859 3rd Marquess of Waterford and Baron Tyrone, 4th Earl of Tyrone, Viscount Tyrone, and Baron Beresford of Beresford, Baron La Poer, 7th Baronet | | John Beresford 1814–1866 4th Marquess of Waterford and Baron Tyrone, 5th Earl of Tyrone, Viscount Tyrone, and Baron Beresford of Beresford, Baron La Poer, 8th Baronet | | George de la Poer Beresford 1811–1873 2nd Baronet of Bagnall | | | | | | | | | | William Robert John Horsley Beresford 1811–1893 3rd Baron Decies |
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| | | | | Baron Beresford (3rd creation) of Metemmeh and Curraghmore in the County of Waterford, 1916 | | | | | | | | | | | | | | | | | | | |
John Henry Beresford 1844–1895 5th Marquess of Waterford and Baron Tyrone, 6th Earl of Tyrone, Viscount Tyrone, and Baron Beresford of Beresford, Baron La Poer, 9th Baronet | | Charles William de la Poer Beresford 1846–1919 Baron Beresford of Metemmeh and Curraghmore | | Henry Monson de la Poer Beresford-Peirse 1850–1926 3rd Baronet of Bagnall | | | | | | William Marcus de la Poer Horsley Beresford 1865–1910 4th Baron Decies | | John Graham Hope Horsley de la Poer Beresford 1866–1944 5th Baron Decies |
| | | | | Barony Beresford (3rd creation) extinct, 1919 | | | | | | | | | | | | | | | | | | |
Henry Beresford 1875–1911 6th Marquess of Waterford and Baron Tyrone, 7th Earl of Tyrone, Viscount Tyrone, and Baron Beresford of Beresford, Baron La Poer, 10th Baronet | | | | | | Henry Bernard de la Poer Beresford-Peirse 1875–1949 4th Baronet of Bagnall | | | | | | | | | | | | | |
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John Charles Beresford 1901–1934 7th Marquess of Waterford and Baron Tyrone, 8th Earl of Tyrone, Viscount Tyrone, and Baron Beresford of Beresford, Baron La Poer, 11th Baronet | | | | | | Henry Campbell de la Poer Beresford-Peirse 1905–1972 5th Baronet of Bagnall | | | | | | | | | | Arthur George Marcus Douglas de la Poer Beresford 1915–1992 6th Baron Decies |
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John Hubert Beresford 1933–2015 8th Marquess of Waterford and Baron Tyrone, 9th Earl of Tyrone, Viscount Tyrone, and Baron Beresford of Beresford, Baron La Poer, 12th Baronet | | | | | | Henry Grant de la Poer Beresford-Peirse 1933–2013 6th Baronet of Bagnall | | | | | | | | | | Marcus Hugh Tristram de la Poer Beresford b. 1948 7th Baron Decies |
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Henry Nicholas Beresford b. 1958 9th Marquess of Waterford and Baron Tyrone, 10th Earl of Tyrone, Viscount Tyrone, and Baron Beresford of Beresford, Baron La Poer, 13th Baronet | | | | | | Henry Njers de la Poer Beresford-Peirse b. 1969 7th Baronet of Bagnall | | | | | | | | | | | | | |
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Richard John Beresford b. 1987 styled Earl of Tyrone | | | | | | Harry Tamlyn de la Poer Beresford-Peirse b. 2007 | | | | | | | | | | Robert Marcus Duncan de la Poer Beresford b. 1988 |
| Heir apparent to the Marquessate of Waterford | | | | | | Heir apparent to the Barony Decies | | | | | | | | | | Heir apparent to the Barony Decies |