Biography
Rachel Cavendish was born 7 June 1727 to William Cavendish, 3rd Duke of Devonshire (1698-1755) and Catherine Hoskins (c1700-1777) and died 7 May 1805 London, England, United Kingdom of unspecified causes. She married Horatio Walpole, 1st Earl of Orford (1723-1809) 12 May 1748 .
Children
| Name | Birth | Death | Joined with |
| Horatio Walpole, 2nd Earl of Orford (1752-1822) | June 1752 | 15 June 1822 | Sophia Churchill (c1745-1797) Catherine Tunstall (-1807) |
| Mary Walpole (c1757-) | |||
| George Walpole (1758-1835) | |||