When copying data from this family tree, please include a reference to the origin: Andre Ottenhoff, "Family tree Ottenhoff - Schilder", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-ottenhoff/I15569.php : accessed January 21, 2026), "Bertha van Cambrai van Vlaanderen (± 895-967)".
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