| Generation 1 - Johanna Maria Drees: Born - 26 Sep 1866 - Rotterdam, Netherlands |
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| Generation 1 - Johanna Maria Drees & Johannes Adrianus Keeman: Married - 30 Jul 1891 - Rotterdam, Netherlands |
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| Generation 2 - Roelof Drees: Died - 23 Oct 1921 - Rotterdam, Netherlands |
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| Generation 2 - Roelof Drees & Anna Detlijn: Married - 21 Mar 1860 - Rotterdam, Netherlands |
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| Generation 2 - Anna Detlijn: Born - 1 Feb 1837 - Rotterdam, Netherlands |
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| Generation 2 - Anna Detlijn: Died - 8 Mar 1907 - Rotterdam, Netherlands |
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| Generation 3 - Antonie Detlijn: Born - 3 Jan 1817 - Rotterdam, Netherlands |
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| Generation 3 - Antonie Detlijn: Died - 5 Nov 1902 - Rotterdam, Netherlands |
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| Generation 3 - Antonie Detlijn & Anna Elizabeth Slingerland: Married - 4 Nov 1835 - Rotterdam, Netherlands |
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| Generation 3 - Anna Elizabeth Slingerland: Died - 26 Sep 1875 - Rotterdam, Netherlands |
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| Generation 4 - Johannes Detlijn: Born - 23 May 1780 - Dordrecht, Netherlands |
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| Generation 4 - Johannes Detlijn: Died - 15 Jul 1833 - Rotterdam, Netherlands |
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| Generation 4 - Johannes Detlijn & Anna Molenaar: Married - 15 Jun 1806 - Rotterdam, Netherlands |
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| Generation 4 - Anna Molenaar: Born - 10 Sep 1781 - Rotterdam, Netherlands |
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| Generation 4 - Anna Molenaar: Died - 7 Oct 1840 - Rotterdam, Netherlands |
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