Margaret de Beaumont by Cawley, Charles and the Foundation for Medieval Genealog...

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Margaret de Beaumont by Cawley, Charles and the Foundation for Medieval Genealogy (FMG) in Medieval Lands: A prosopography of medieval European noble and royal families. Published online by FMG, including source citations and relevant texts: England, Earls Created 1067-1122 v5.0 Updated 3 Dec 2025' (see also WikiTree's source page for MedLands).

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