Harriet married Henry Frederick Thynne (maid. name 3rd Marquess of Bath) on 19 Apr 1830 in Westminster, Middlesex, England. Henry (son of Thomas ( 2nd Marquess of Bath) Thynne and Isabella Elizabeth Byng) was born on 24 May 1797 in Marylebone, London, England; died on 24 Jun 1837 in Longbridge Dever, Wiltshire, England. [Group Sheet] [Family Chart]

1. John Alexander, (4th Marquess of Bath) Thynne was born on 1 Mar 1831 in Westminster, London, England; died on 20 Apr 1896 in Italy.
2. Henry Frederick Thynne (maid. name Jr.) was born on 2 Aug 1832 in Longbridge Deverill, Wiltshire, England; died on 28 Jan 1904 in Worthing, Sussex, England.
3. Alice Charlotte Thynne was born in Dec 1833; died in 1847 in Somerset, England.
4. Louisa Isabella Harriet Thynne was born in 1835 in Longbridge Deverill, Wiltshire, England; died on 26 Jun 1919 in Surrey, England.