When copying data from this family tree, please include a reference to the origin: J.H. Vroom, "Family tree Vroom, mijn familie uit de provincie Groningen en vele aangehuwde verwanten.", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-vroom/I457.php : accessed March 5, 2026), "Luitje Koekkoek (1888-????)".
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