| 1. Jan Koster |
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| G: |
14 mei 1823 |
| te: |
Poortugaal, Zuid-Holland, NLD |
| O: |
13 feb 1832 |
| te: |
Poortugaal, Zuid-Holland, NLD |
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| 3. Pietertje Jansdr Koster |
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| G: |
14 sep 1799 |
| te: |
Poortugaal, Zuid-Holland, NLD |
| O: |
31 okt 1827 |
| te: |
Albrandswaard, Zuid-Holland, NLD |
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| 6. Jan Willemsz Koster |
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| D: |
20 mrt 1763 |
| te: |
Poortugaal, Zuid-Holland, NLD |
| H: |
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| O: |
3 nov 1818 |
| te: |
Poortugaal, Zuid-Holland, NLD |
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| 12. Willem Jansz Koster |
=> |
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| D: |
22 sep 1737 |
| te: |
Hoogvliet, Zuid-Holland, NLD |
| H: |
17 okt 1762 |
| te: |
Poortugaal, Zuid-Holland, NLD |
| O: |
6 dec 1798 |
| te: |
Poortugaal, Zuid-Holland, NLD |
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| 14. Arij Jacobsz Boudestein |
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| D: |
1 dec 1737 |
| te: |
Gouderak, Zuid-Holland, NLD |
| H: |
4 dec 1768 |
| te: |
Poortugaal, Zuid-Holland, NLD |
| O: |
26 mei 1816 |
| te: |
Poortugaal, Zuid-Holland, NLD |
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1823 - 1832 (8 jaar)
