When copying data from this family tree, please include a reference to the origin: Marja, "Family tree Colijn/Van de Waal/Kamphuis/De Ridder", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-kamphuis-colijn-van-de-waal-de-ridder/I474.php : accessed June 15, 2024), "Dirck de Kromme".
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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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