When copying data from this family tree, please include a reference to the origin: Herman Leonard Smeets, "Family tree Smeets/Berendsen", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-herman-en-claudia-smeets/I4258.php : accessed May 15, 2024), "Willem van Horne van Merum (± 1169-± 1197)".
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