When copying data from this family tree, please include a reference to the origin: Weijerman, "Family tree Weijerman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weijerman/I8908.php : accessed January 6, 2026), "Olga Catharina van Kiev (± 1280-± 1340)".
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Request permission to copy data or at least inform the author, chances are that the author gives permission, often the contact also leads to more exchange of data.
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