When copying data from this family tree, please include a reference to the origin: Geertruida Limburg, "Family tree Petra Limburg", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-petra-limburg/P5438.php : accessed May 5, 2024), "Rollo 1st Duke of Normandy Ragnvaldsson (± 846-932)".
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