| Father | Cdr Edmund Marmaduke DAYRELL RN (1835 - 1909) |
| Mother | Isabella Ann Elphinstone HOLLOWAY (1841 - 1882) |
| Sibling | Annie Letitia Frances DAYRELL (1867 - 1945) |
| Sibling | Lt Col Gerrald Marmaduke De Langport DAYRELL (1868 - 1946) |
| Sibling | Elphinstone Edmund DAYRELL (1870 - 1917) |
| Sibling | Frances Miriam Clare DAYRELL (1872 - 1958) |
| Sibling | Milly DAYRELL (1873 - 1874) |
| Sibling | Eleanor DAYRELL (1875 - 1940) |
| Sibling | Adela DAYRELL (1876 - 1956) |
| Sibling | Edmund Marmaduke DAYRELL (1879 - 1879) |
| Sibling | Elizabeth Mary DAYRELL (1882 - ) |