When copying data from this family tree, please include a reference to the origin: Sanne van den Eijnde, "Family tree van de familie Van den Eijnde(n) uit Gemert en Haarlem", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-den-eijnde/I12640323.php : accessed February 17, 2026), "Jacob Martensen (1660-????)".
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