1880 - 1935 (54 jaar)
Willem Jan Pieter Landa 1901-1980 |
| Willem Jan Pieter Landa | |
| G: | 8 mrt 1901 |
| Den Haag | |
| O: | 1980 |
| Mathilda de Jong 1902-1986 |
| Mathilda de Jong | |
| G: | 6 mrt 1902 |
| Hillegersberg | |
| H: | 28 jun 1922 |
| Rotterdam | |
| O: | 1986 |
|
| Wilhelmina Johanna Catharina de Wit 1880-1935 |
| Wilhelmina Johanna Catharina de Wit | |
| G: | 22 okt 1880 |
| Den Haag | |
| O: | 11 jan 1935 |
| Den Haag | |
| Willem Adriaan Landa | |
| H: | 23 mei 1900 |
| 's-Gravenhage | |
| Herman Egbertus Koopmans -1964 |
| Herman Egbertus Koopmans | |
| H: | 7 jul 1915 |
| 's-Gravenhage | |
| O: | 28 okt 1964 |
| 's-Gravenhage | |
