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| 4. Harmannes Portman |
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| G: |
27 sep 1789 |
| te: |
Groningen |
| H: |
17 mei 1818 |
| te: |
Groningen |
| O: |
09 aug 1859 |
| te: |
Groningen |
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| 8. Christopher Poortman |
=> |
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| G: |
CA __-__-1760 |
| te: |
Westerstede (Dld, graafschap Oldenburg) |
| H: |
31 okt 1782 |
| te: |
Groningen |
| O: |
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| te: |
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| 5. Cornelia Venema |
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| G: |
02 feb 1797 |
| te: |
Groningen |
| O: |
27 jan 1881 |
| te: |
Groningen |
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| 10. Derk Venema |
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| G: |
CA __-__-1770 |
| te: |
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| H: |
CA __-__-1793 |
| te: |
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| O: |
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| 12. |
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| 13. |
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| 14. |
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| 15. |
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1856 - 1929 (72 jaar)