When copying data from this family tree, please include a reference to the origin: Reinhard van Elderen, "Family tree Van Elderen en Van der Speld", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-elderen-en-van-der-speld/I514108.php : accessed June 23, 2024), "Mechtildis von der Mark von Altena (1260-1316)".
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Please stick to the following rules
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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