De stambomen van elk van onze 4 grootouders (Van de Sanden, van den Hout, Peijs Geerts en Smits, Morée, Gierman en Van Schoonhoven)

| Petrus Gierman | |
| G: | ca. 1888 |
| Delfzijl | |
| Johanna Knol | |
| G: | ca. 1893 |
| Appingedam | |
| H: | 31 okt 1914 |
| Appingedam | |
| Maria Pietronella Gierman | |
| G: | ca. 1916 |
| O: | 17 feb 1931 |
| Maastricht | |
| Wilhelmus Josephus Gierman | |
| G: | ca. 1890 |
| Delfzijl | |
| O: | vóór 3 jun 1960 |
| Jannetje Meijer | |
| G: | ca. 1894 |
| Weesperkarspel | |
| H: | 19 aug 1915 |
| Weesperkarspel | |
| O: | 3 jun 1960 |
| Maastricht | |
| Jan Gierman | |
| G: | ca. 1892 |
| Delfzijl | |
| Aaltje Knol | |
| G: | ca. 1901 |
| Appingedam | |
| H: | 28 dec 1918 |
| Appingedam | |
|
| Maria Pietronella Schoe | |
| G: | ca. 1858 |
| Delfzijl | |
| Wilhelmus Josephus Gierman | |
| G: | 26 jan 1846 |
| Rhienderen, Brummen | |
| H: | 5 nov 1884 |
| Delfzijl | |
| O: | 9 feb 1896 |
| Delfzijl | |
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