Check the information Open Archives has about Sigterman.
Check the Wie (onder)zoekt wie? register to see who is (re)searching Sigterman.
The Family tree Fellman publication was prepared by Fred W. Fellman (contact is not possible).
When copying data from this family tree, please include a reference to the origin: Fred W. Fellman, "Family tree Fellman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-fellman/I1007.php : accessed February 2, 2026), "Henricus Johannes Sigterman".
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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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