When copying data from this family tree, please include a reference to the origin: Marvin Loyd Welborn, "Family Tree Welborn", database, Genealogy Online (https://www.genealogieonline.nl/family-tree-welborn/I8360.php : accessed June 8, 2024), "Marie de Dreux Brittany, Countess of Saint-Pol (1268-1339)".
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