John fitz Geoffrey, entry in the database Medieval Lands: A prosopography of med...

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John fitz Geoffrey, entry in the database Medieval Lands: A prosopography of medieval European noble and royal families by Charles Cawley © Foundation for Medieval Genealogy, 2000-2017. Note: This source does not mention Herman van Heusden, but is a source for this son Arnold van Heusden.</li></ol>

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