When copying data from this family tree, please include a reference to the origin: Hedwich de Vries, "Reeks Kornilliske Postma en Johannes de Vries", database, Genealogy Online (https://www.genealogieonline.nl/reeks-kornilliske-postma-en-johannes-de-vries/I3653.php : accessed June 9, 2024), "Heligaud Ii van Boulogne (± 805-864)".
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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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