When copying data from this family tree, please include a reference to the origin: Harm Jan Luth-Mulders, "Genealogische Databank Maassluis", database, Genealogy Online (https://www.genealogieonline.nl/genealogische-databank-maassluis/I1555.php : accessed May 7, 2024), "Pieter Jacobse van der Kooij (< 1730-????)".
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Request permission to copy data or at least inform the author, chances are that the author gives permission, often the contact also leads to more exchange of data.
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