 1875 - 1941  (66 jaar)
 1875 - 1941  (66 jaar)
| Marten Werkman  1891-1954 | 
| Marten Werkman | |
| G: | 14 jul 1891 | 
| Oosterwijwerd | |
| O: | 8 nov 1954 | 
| Assen | |
| Geert Werkman  1902-1969 | 
| Geert Werkman | |
| G: | 3 feb 1902 | 
| Appingedam | |
| O: | 12 okt 1969 | 
| Appingedam | |
| Hendrik Werkman  1907-1960 | 
| Hendrik Werkman | |
| G: | 5 apr 1907 | 
| Appingedam | |
| O: | 25 nov 1960 | 
| Groningen | |
| Kornelis Werkman  1875-1941 | 
| Kornelis Werkman | |
| G: | 1875 | 
| Schildwolde | |
| O: | 2 sep 1941 | 
| Groningen | |
| Martje Smit  1872-1957 | 
| Martje Smit | |
| G: | 11 apr 1872 | 
| Bierum | |
| H: | 8 apr 1896 | 
| Loppersum | |
| O: | 9 dec 1957 | 
| Appingedam | |