| Irtz, Carl Diederich | 1876 | Blumenthal | |
| Irtz, Henriette Martha | 1879 | Blumenthal | |
| Irtz, Hinrike Gesine Lucie | 1881 | Blumenthal | |
| Irtz, Berta Lucie | 1883 | Blumenthal | |
| Irtz, Anna Helene | 1885 | Blumenthal | |
| Irtz, Bertha Lucie | 1890 | Blumenthal | |
| Irtz, Margarete | 1891 | Blumenthal |