The Descendants Nienhuis, Dijkhuis, Smits en Spier publication was prepared by Jan Nienhuis (contact is not possible).
When copying data from this family tree, please include a reference to the origin: Jan Nienhuis, "Descendants Nienhuis, Dijkhuis, Smits en Spier", database, Genealogy Online (https://www.genealogieonline.nl/parenteel-nienhuis/I5935.php : accessed May 31, 2024), "Gerrit Klap (????-> 1972)".
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