Lady Isabella Fitzroy, Countess of Hertford
1726 - 1782 (56 years)(Notes: You may have to scroll down or right to see chart.)
| Adelaide Horatia Seymour 1825-1877 |
| Adelaide Horatia Seymour | |
| B: | 1825 |
| D: | 1877 |
Frederick Spencer, 4th Earl Spencer 1798-1857 |
| Frederick Spencer, 4th Earl Spencer | |
| B: | 14 Apr 1798 |
| Admiralty Building, Whitehall, London, England | |
| D: | 27 Dec 1857 |
| Althrop, Northamptonshire, England | |
| Colonel Sir Horace Beauchamp Seymour 1791-1851 |
| Colonel Sir Horace Beauchamp Seymour | |
| B: | 22 Nov 1791 |
| D: | 23 Nov 1851 |
| Elizabeth Malet Palk 1797-1827 |
| Elizabeth Malet Palk | |
| B: | 1797 |
| D: | 18 Jan 1827 |
| Vice-Admiral Lord Hugh Seymour 1759-1801 |
| Vice-Admiral Lord Hugh Seymour | |
| B: | 29 Apr 1759 |
| London, England | |
| D: | 11 Sep 1801 |
| HMS Tisiphone, off Jamaica | |
| Lady Anne Horatia Waldegrave 1762-1801 |
| Lady Anne Horatia Waldegrave | |
| B: | 1762 |
| D: | 12 Jun 1801 |
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| Lady Isabella Fitzroy, Countess of Hertford | |
| B: | 1726 |
| D: | 10 Nov 1782 |
| Francis Seymour-Conway, 1st Marquess of Hertford | |
| B: | 5 Jul 1718 |
| Chelsea, London, England | |
| D: | 14 Jun 1794 |
| Surrey, England | |