| | Michael Hill (1672–1699) | | | | See also: Archbishop Sandys family tree |
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Viscount Hillsborough and Baron Hill of Kilwarlin, 1717 | | Viscount Dungannon (2nd creation) and Baron Hill of Olderfleet, 1766 | | Baron Sandys of Ombersley in the County of Worcester (2nd creation), 1743 |
Trevor Hill (1693–1742) 1st Viscount Hillsborough and Baron Hill of Kilwarlin | | Arthur Hill-Trevor (1694–1771) 1st Viscount Dungannon and Baron Hill of Olderfleet | | Samuel Sandys (1695–1770) 1st Baron Sandys |
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Earl of Hillsborough (Ireland) and Viscount Kilwarlin, 1751 Baron Harwich, 1756 Marquess of Downshire, Earl of Hillsborough (Great Britain) and Viscount Fairford, 1789 | | | | | | | | | | | | | | |
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Wills Hill (1718–1793) 1st Marquess of Downshire, Earl of Hillsborough (Ire & GB), Viscount Kilwarlin, Viscount Fairford, and Baron Harwich, 2nd Viscount Hillsborough and Baron Hill of Kilwarlin | | | | | | Edwin Sandys (1726–1797) 2nd Baron Sandys | | Martin Sandys (1729–1768) |
| | | | | | | | | Barony Sandys (2nd creation) extinct, 1797 | | | | | |
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| | | | | | | | | Baron Sandys of Ombersley in the County of Worcester (3rd creation), 1802 |
| | | | Arthur Hill (1753–1801) 2nd Marquess of Downshire, Earl of Hillsborough (Ire & GB), Viscount Kilwarlin, Viscount Fairford, and Baron Harwich, 3rd Viscount Hillsborough and Baron Hill of Kilwarlin | | Mary Hill (1764–1836) 1st Baroness Sandys |
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Arthur Blundell Sandys Trumbull Hill (1788–1845) 3rd Marquess of Downshire, Earl of Hillsborough (Ire & GB), Viscount Kilwarlin, Viscount Fairford, and Baron Harwich, 4th Viscount Hillsborough and Baron Hill of Kilwarlin | | Arthur Moyses William Hill (1792–1860) 2nd Baron Sandys | | Arthur Marcus Cecil (Hill) Sandys (1798–1863) 3rd Baron Sandys | | George Augusta Hill (1801–1879) |
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Arthur Wills Blundell Sandys Trumbull Windsor Hill (1812–1868) 4th Marquess of Downshire, Earl of Hillsborough (Ire & GB), Viscount Kilwarlin, Viscount Fairford, and Baron Harwich, 5th Viscount Hillsborough and Baron Hill of Kilwarlin | | | | | | | | | | | | | | |
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Arthur Wills Blundell Trumbull Sandys Roden Hill (1844–1874) 5th Marquess of Downshire, Earl of Hillsborough (Ire & GB), Viscount Kilwarlin, Viscount Fairford, and Baron Harwich, 6th Viscount Hillsborough and Baron Hill of Kilwarlin | | Augustus Frederick Arthur (Hill) Sandys (1840–1904) 4th Baron Sandys | | Michael Edwin Marcus (Hill) Sandys (1855–1948) 5th Baron Sandys | | Arthur Sandys Hill (1837–1923) |
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Arthur Wills John Wellington Trumbull Blundell Hill (1871–1918) 6th Marquess of Downshire, Earl of Hillsborough (Ire & GB), Viscount Kilwarlin, Viscount Fairford, and Baron Harwich, 7th Viscount Hillsborough and Baron Hill of Kilwarlin | | | | | | | | | | Arthur Fitzgerald Sandys Hill (1876–1961) 6th Baron Sandys |
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Arthur Wills Percy Wellington Blundell Trumbull Hill (1894–1989) 7th Marquess of Downshire, Earl of Hillsborough (Ire & GB), Viscount Kilwarlin, Viscount Fairford, and Baron Harwich, 8th Viscount Hillsborough and Baron Hill of Kilwarlin | | Lord Arthur Francis Hill (1895–1953) | | | | | | | | | |
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| | | | Arthur "Robin" Ian Hill (1929–2003) 8th Marquess of Downshire, Earl of Hillsborough (Ire & GB), Viscount Kilwarlin, Viscount Fairford, and Baron Harwich, 9th Viscount Hillsborough and Baron Hill of Kilwarlin | | | | | | Richard Hill (1931–2013) 7th Baron Sandys |
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| | | | Arthur Francis "Nicholas" Wills Hill (b. 1959) 9th Marquess of Downshire, Earl of Hillsborough (Ire & GB), Viscount Kilwarlin, Viscount Fairford, and Baron Harwich, 10th Viscount Hillsborough and Baron Hill of Kilwarlin, 8th Baron Sandys |
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| | | | Edmund Robin Arthur Hill (b. 1996) styled Earl of Hillsborough |
| | | | Heir apparent to the Marquessate of Downshire and the Barony of Sandys |