| 1. Jan Portman |
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| G: |
14 jun 1869 |
| te: |
Groningen |
| O: |
26 aug 1934 |
| te: |
Rheden [Dieren] |
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| 2. Christoffer Portman |
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| G: |
02 jan 1829 |
| te: |
Groningen |
| H: |
31 mei 1863 |
| te: |
Groningen |
| O: |
31 dec 1870 |
| te: |
Groningen |
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| 4. Jan Poortman |
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| G: |
24 aug 1783 |
| te: |
Groningen |
| H: |
01 feb 1827 |
| te: |
Groningen |
| O: |
16 dec 1860 |
| 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. Trientje Jans |
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| G: |
03 mei 1799 |
| te: |
Groningen |
| O: |
01 feb 1871 |
| te: |
Groningen |
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| 12. |
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| 15. |
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1869 - 1934 (65 jaar)