| 1. Harm Koolhof |
 |
| G: |
01 jul 1904 |
| te: |
Blijham, Wedde, NL |
| O: |
05 jun 1978 |
| te: |
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| 2. Jan Koolhof |
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| G: |
31 aug 1867 |
| te: |
Scheemda, NL |
| H: |
16 mei 1894 |
| te: |
Wedde, NL |
| O: |
17 sep 1934 |
| te: |
Weddermarke, Wedde, NL |
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| 4. Harm Koolhof |
|
| G: |
24 sep 1843 |
| te: |
Nieuweweg, Veendam, NL |
| H: |
28 sep 1867 |
| te: |
Scheemda, NL |
| O: |
25 jan 1937 |
| te: |
Wedde, NL |
|
| 8. Jan Alberts Koolhof |
=> |
|
| G: |
19 dec 1807 |
| te: |
Finsterwolde, NL |
| H: |
29 dec 1831 |
| te: |
Nieuwolda, NL |
| O: |
03 aug 1890 |
| te: |
Kibbelgaarn, Veendam, NL |
|
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| 5. Martje de Wal |
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| G: |
07 feb 1845 |
| te: |
Westerlee, Scheemda, NL |
| O: |
01 jul 1869 |
| te: |
Westerlee, Scheemda, NL |
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| 12. |
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| 13. |
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| 14. |
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| 15. |
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1904 - 1978 (73 jaar)
