Henry Cecil, 1st Marquess of Exeter, was born 14 March 1754 in Bruxelles, Belgium to Thomas Chambers Cecil (c1728-1778) and Charlotte Garnier (-) and died 1 May 1804 Pembroke House, Greater London, England, United Kingdom of unspecified causes. He married Emma Vernon (-) 23 May 1776 . He married Sarah Hoggins (c1773-1797) 3 October 1791 . He married Elizabeth Anne Burrell (1757-1837) 19 August 1800 . Charlemagne (747-814)/s, Henry II of England (1133-1189)/s, Hugh Capet (c940-996)/s, William I of England (1027-1087)/s.
|Sophia Cecil (1793-1823)||1793||1823||Henry Manvers Pierrepont (1780-1851)|
|Brownlow Cecil, 2nd Marquess of Exeter (1795-1867)||2 July 1795 Burghley House, Stamford, Lincolnshire, England, United Kingdom||16 January 1867 Burghley House, Stamford, Lincolnshire, England, United Kingdom||Isabella Poyntz (1803-1879)|
|Thomas Cecil (1797-1873)||1 January 1797||29 November 1873||Sophia Georgiana Lennox (1809-1902)|