| Father | Sir John Hesketh Lethbridge 3rd Bt (1798 - 1873) |
| Mother | Julia Hoare (1800 - 1855) |
| Sibling | Ada Cicely Georgiana Lethbridge (1828 - 1911) |
| Sibling | Sir Wroth Acland Lethbridge 4th Bt (1831 - 1902) |
| Sibling | Anna Maria Lethbridge (1832 - 1860) |
| Sibling | Ernest Acland Lethbridge (1833 - 1848) |
| Sibling | Grace Catherine Lethbridge (1834 - 1871) |
| Sibling | Alda Gertrude Lethbridge (1836 - 1906) |
| Sibling | Agnes Maria Lethbridge (1838 - 1915) |
| Sibling | Albert Arthur Erin Lethbridge (1840 - 1872) |
| Sibling | Julia Decima Lethbridge (1841 - 1900) |
| Sibling | Susanna Octavia Lethbridge (1844 - 1920) |
| Sibling | Walter Buckler Lethbridge (1845 - 1907) |