Biography
Louisa O'Callaghan was born 5 August 1779 to Cornelius O'Callaghan, 1st Baron Lismore (1741-1797) and Frances Ponsonby (1757-1827) and died 18 April 1863 Chislehurst, Greater London, England, United Kingdom of unspecified causes. She married William Cavendish (1783-1812) 19 July 1807 in Berkeley Square, Greater London, England, United Kingdom.
Children
| Offspring of William Cavendish and Louisa O'Callaghan (1779-1863) | |||
| Name | Birth | Death | Joined with |
| William Cavendish, 7th Duke of Devonshire (1808-1891) | 27 April 1808 | 21 December 1891 Holker Hall, Cumbria, England, United Kingdom | Blanche Georgiana Howard (1812-1840) |
| Fanny Cavendish (1809-1885) | 11 April 1809 | 30 December 1885 | Frederick John Howard (1814-1897) |
| George Henry Cavendish (1810-1880) | 19 August 1810 | 23 September 1880 | Louisa Lascelles (1812-1886) |
| Richard Cavendish (1812-1873) | 3 July 1812 Clapham, Greater London, England, United Kingdom | 19 November 1873 | |
Footnotes (including sources)
| ‡ General |
|
