When copying data from this family tree, please include a reference to the origin: Helma Bovenschen-van Gelderen, "Genealogy Bovenschen, Looijenga, Van Gelderen en Van Donk", database, Genealogy Online (https://www.genealogieonline.nl/genealogie-bovenschen/I105931.php : accessed April 18, 2024), "Ulrich van Schlüsselberg (????-1288)".
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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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