Open Archives
You have searched for persons in records with Johannes Koolen in the name, this gives 6,026 search results.
The term Johannes Koolen appears in user-added comments on records 1
Find your ancestors and publish your family tree on Genealogy Online via https://www.genealogieonline.nl/en/
You can instruct Open Archives to monitor this search. When there are new search results you will be notified by e-mail.
The results of the search can be downloaded in PDF and GEDCOM format.
To use this functionality, you must have a subscription and be logged in.
You can download the result list in spreadsheet format (CSV or XLS). This is possible up to a maximum of 10,000 results.