Mildred Arabella Charlotte Gascoyne-Cecil (1822-1881) was born 21 October 1822 in Westminster, Middlesex, England, United Kingdom to James Brownlow William Gascoyne-Cecil, 2nd Marquess of Salisbury (1791-1868) and Frances Mary Gascoyne (1802-1839) and died 18 March 1881 Bedgebury Park, Cranbrook, Kent, England, United Kingdom of unspecified causes. She married Alexander James Beresford Beresford-Hope (1820-1887) 7 July 1842 in Westminster, Middlesex, England, United Kingdom.
Children
| Name | Birth | Death | Joined with |
| Louisa Mary Beresford-Hope (1844-1923) | |||
| Etheldreda Beresford-Hope (1845-1928) | |||
| Mildred Beresford-Hope (1846-1869) | |||
| Margaret Beresford-Hope (1847-1900) | |||
| Catherine Beresford-Hope (1848-1869) | |||
| Agnes Beresford-Hope (1849-1917) | |||
| Philip Beresford Beresford-Hope (1851-1916) | |||
| Bridget Beresford-Hope (1853-1896) | |||
| Mary Frances Beresford-Hope (1854-1944) | |||
| Charles Thomas Beresford-Hope (1856-1906) | |||
Siblings
| Name | Birth | Death | Joined with |
| Sackville Arthur Gascoyne-Cecil (1848-1898) | |||
| Mary Arabella Arthur Gascoyne-Cecil (1850-1903) | 26 April 1850 Hertfordshire, England, United Kingdom | 18 August 1903 Cuffnells Estate, Lyndhurst, Hampshire, England, United Kingdom | Alan Plantagenet Stewart, 10th Earl of Galloway (1835-1901) |
| Margaret Elizabeth Gascoyne-Cecil (1850-1919) | |||
| Arthur Gascoyne-Cecil (1851-1913) | |||
| Lionel Gascoyne-Cecil (1853-1901) | |||