When copying data from this family tree, please include a reference to the origin: Irene Jolanda van der Meulen, "Complete stambomen van der Meulen, Visser, Alkema, Zondervan, van Gorkum, de Vries.", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-gertje-de-vries/I6688.php : accessed May 23, 2024), "Sjirk Johannes Jousma".
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