When copying data from this family tree, please include a reference to the origin: Donald Simmons Jr., "Donald A.C. Simmons Jr. Family Tree", database, Genealogy Online (https://www.genealogieonline.nl/donald-a-c-simmons-jr-family-tree/I132560774759.php : accessed May 8, 2025), "Maria Christina d'Avesnes (1280-1354)".
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