When copying data from this family tree, please include a reference to the origin: MMJ Meijer Ettema, "Family tree Wester / Schoonenberg Beverwijk", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-wester-schoonenberg/I534.php : accessed February 22, 2026), "Jan Dirkz Oomen (????-< 1821)".
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