When copying data from this family tree, please include a reference to the origin: Pieter C. Bismeijer, "Bißmeyer-Bissmeyer-Bismeyer-Bismeijer Family", database, Genealogy Online (https://www.genealogieonline.nl/bismeijer-family/I69371.php : accessed May 12, 2024), "Isolde (Iseude Iswolde) de Mortimer (????-1328)".
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