ca. 1877-
| Franciscus Adrianus Beckmann | |
| G: | ca. 1877 |
| Rotterdam | |
1876-
| Wijntje Ketz | |
| G: | 12 jan 1876 |
| Kralingen | |
| H: | 25 apr 1900 |
| Rotterdam | |
ca. 1883-
| Adrianus Beckmann | |
| G: | ca. 1883 |
| Rotterdam | |
1886-
| Christina Ketz | |
| G: | 28 sep 1886 |
| Rotterdam | |
| H: | 7 nov 1906 |
| Rotterdam | |