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/I25656.php : accessed May 21, 2024), "Aef Sjerps (Aeffcke) Boeledr (± 1580-< 1618)".
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