Check the information Open Archives has about Langschmidt.
Check the Wie (onder)zoekt wie? register to see who is (re)searching Langschmidt.
The Family tree Van Willigen publication was prepared by Rob van Willigen (contact is not possible).
When copying data from this family tree, please include a reference to the origin: Rob van Willigen, "Family tree Van Willigen", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-willigen/I7491.php : accessed January 23, 2026), "Carel Wilhelm Langschmidt (1861-1945)".
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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.
Do not use this data until you have checked it, preferably at the source (the archives).
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