When copying data from this family tree, please include a reference to the origin: Henny Tönis, "Genealogy Tönis, ten Vergert, Leferink op Reinink en Welman", database, Genealogy Online (https://www.genealogieonline.nl/genealogie-tonis/I3760.php : accessed June 10, 2024), "Johan Groverss (± 1650-????)".
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