Check the information Open Archives has about Jacobs.
Check the Wie (onder)zoekt wie? register to see who is (re)searching Jacobs.
The Family tree Van Otterlo publication was prepared by Hans van Otterlo (contact is not possible).
When copying data from this family tree, please include a reference to the origin: Hans van Otterlo, "Family tree Van Otterlo", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-otterlo/I8341.php : accessed June 19, 2024), "Nieske Jacobs".
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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.
Do not use this data until you have checked it, preferably at the source (the archives).
State from whom you have copied the data and ideally also his/her original source.