When copying data from this family tree, please include a reference to the origin: Joke Koster, "Family tree Griffioen Jellema Friese Adel", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-griffioen-koster/I147230.php : accessed September 27, 2024), "Hylkje (Hijlkje Hylck) Johannes (Joannis) (± 1635-> 1665)".
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