When copying data from this family tree, please include a reference to the origin: Alexander Cavalera, "Genealogy Familie Cavalera - Hirschberg", database, Genealogy Online (https://www.genealogieonline.nl/genealogie-familie-cavalera-hirschberg/I432376584285.php : accessed September 20, 2024), "Helena Kooijmans (± 1816-????)".
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