William Fitzwilliam, 3rd. Earl Fitzwilliam
1719 - 1756 (37 years)(Notes: You may have to scroll down or right to see chart.)
| William Thomas Spencer Fitzwilliam, 6th. Earl Fitzwilliam | |
| B: | 12 Oct 1815 |
| Castor, Northamptonshire, England | |
| D: | 20 Feb 1902 |
| Wentworth, Yorkshire, England | |
Lady Frances Harriet Douglas 1819-1895 |
| Lady Frances Harriet Douglas | |
| B: | 1819 |
| Berlin, Germany | |
| D: | 16 Jun 1895 |
| Shillelagh, County Wicklow, Ireland | |
| Charles William Fitzwilliam, 5th. Earl Fitzwilliam | |
| B: | 4 May 1786 |
| Grosvenor Sq. London, England | |
| D: | 4 Oct 1857 |
| Wentworth, Yorkshire, England | |
| Mary Dundas 1786-1830 |
| Mary Dundas | |
| B: | May 1786 |
| D: | 1 Nov 1830 |
| Wentworth, Yorkshire, England | |
| William Fitzwilliam, 4th. Earl Fitzwilliam | |
| B: | 30 May 1748 |
| Milton House, Peterborough, Northamptonshire, England | |
| D: | 8 Feb 1833 |
| Milton House, Peterborough, Northamptonshire, England | |
| Lady Charlotte Ponsonby Abt 1750-1822 |
| Lady Charlotte Ponsonby | |
| B: | Abt 1750 |
| D: | 13 May 1822 |
| Hon. Louisa Molesworth 1749-1824 |
| Hon. Louisa Molesworth | |
| B: | 23 Oct 1749 |
| D: | 1 Sep 1824 |
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| William Fitzwilliam, 3rd. Earl Fitzwilliam | |
| B: | 15 Jan 1719 |
| D: | 10 Aug 1756 |
| Lady Ann Watson-Wentworth Unknown-1769 |
| Lady Ann Watson-Wentworth | |
| B: | Unknown |
| D: | 29 Aug 1769 |