| Father | Peter MCDERMOTT (1830 - 1913) |
| Mother | Ellen ROCHE (1841 - 1918) |
| Sibling | John Joseph MCDERMOTT (1864 - ) |
| Sibling | Hanora MCDERMOTT (1866 - 1866) |
| Sibling | Peter MCDERMOTT (1867 - 1944) |
| Sibling | David MCDERMOTT (1869 - 1946) |
| Sibling | Catherine MCDERMOTT (1870 - 1954) |
| Sibling | Ellen MCDERMOTT (1872 - 1936) |
| Sibling | Elizabeth (Eliza) MCDERMOTT (1873 - 1954) |
| Sibling | Bridget MCDERMOTT (1875 - 1954) |
| Sibling | Michael MCDERMOTT (1877 - 1967) |
| Sibling | Margaret MCDERMOTT (1879 - 1898) |
| Sibling | Christina MCDERMOTT (1882 - 1924) |
| Sibling | Thomas MCDERMOTT (1883 - 1949) |
| Sibling | Richard Francis MCDERMOTT (1886 - ) |