| Father | Dorotheus Ermens (1865 - 1942) |
| Mother | Maria Gerards (1876 - 1972) |
| Sibling | Janus; Adrianus Wilhelmus Ermens (1900 - ) |
| Sibling | Petrus Fransiscus Ermens (1901 - ) |
| Sibling | Johannes Adrianus Ermens (1903 - 1903) |
| Sibling | Johannes Hendrikus Ermens (1904 - ) |
| Sibling | Johanna Ermens (1906 - 1906) |
| Sibling | Franciscus Ermens (1907 - ) |
| Sibling | Cornelis Ermens (1909 - 1965) |
| Sibling | Wilhelmus Theodorus Ermens (1910 - ) |
| Sibling | Christiaan Ermens (1913 - 1914) |
| Sibling | Christiaan Ermens (1917 - 1989) |
| Sibling | Andreas Ermens (1919 - ) |