| Gijsbertus Jacobus Olsthoorn |
| Gijsbertus Jacobus Olsthoorn | |
| G: | 5 dec 1927 |
| Kethel en Spaland | |
| O: | Ja, datum echter onbekend |
| Helena Adriana Olsthoorn |
| Helena Adriana Olsthoorn | |
| G: | 19 jan 1925 |
| Kethel en Spaland | |
| H: | 11 jul 1956 |
| O: | 5 feb 2017 |
| Schiedam | |
|
| Maria Arnolda Roeling |
| Maria Arnolda Roeling | |
| G: | 7 feb 1898 |
| Kethel | |
| O: | 6 mei 1985 |
| Vlaardingen | |
| Cornelis Adrianus Ludovicus Olsthoorn |
| Cornelis Adrianus Ludovicus Olsthoorn | |
| G: | 3 feb 1894 |
| Kethel | |
| H: | 16 mei 1923 |
| Kethel en Spaland | |
| O: | 14 dec 1956 |
| Kethel | |