1914-2005
| Geertruida Adriana Barbara Schalk | |
| G: | 1914 | 
| Heerlen | |
| O: | 2005 | 
| Breda | |
 -1970
| Bertus Koppijn | |
| G: | Amsterdam | 
| H: | Ja, datum echter onbekend | 
| O: | 27 dec 1970 | 
 1916-2008
| Leonarda Louisa Schalk | |
| G: | 1916 | 
| Semarang, Nederlands Indi | |
| O: | 2008 | 
 1921-1994
| Adriana Anthonia Johanna Schalk | |
| G: | 1921 | 
| Soerakarta, Nederlands Indi | |
| O: | 1994 | 
| Heerlen | |
 1925-2005
| Klaas Ijkema | |
| G: | 1925 | 
| Oudehaske, Haskerland (Fr) | |
| H: | 1951 | 
| Davos, Graub | |
| O: | 2005 | 
| Heerlen | |
  | 
 1893-1966
| Barbara Josephina Tiggelman | |
| G: | 1893 | 
| Breda | |
| O: | 1966 | 
| Breda | |
 1892-1975
| Ludovicus Cornelius Adrianus Schalk | |
| G: | 1892 | 
| Breda | |
| H: | 1915 | 
| Breda | |
| O: | 1975 | 
| Breda | |