| Hon William Cavendish |
George Howard, 6th Earl of Carlisle (1773-1848) |
| Hon Lousia O'Callaghan | Lady Georgiana Dorothy Cavendish (1783-1858) |
m.
William Cavendish, 7th Duke of
Devonshire
 |
Lady Blanche Georgiana Howard |
| b. 27 April 1808 d. 21 Dec 1891 bur. occ. edu. rel. bp. |
b. 11 Jan 1812 d. 27 Apr 1840 bur. occ. edu. rel. bp. |
Children
| Lady Louisa Caroline Cavendish (-21 Sept 1907) William Cavendish (8 Oct 1831-15 May 1834) Spencer Compton Cavendish, 8th Duke of Devonshire (23 Jul 1833-24 Mar 1908) Rt Hon Lord Frederick Charles Cavendish (30 Nov 1836-6 May 1882) Lord Edward Cavendish (28 Jan 1838-18 May 1891) |