"France, Bretagne, registres paroissiaux et état-civil, 1521-1896," , FamilySearch (https://familysearch.org/ark:/61903/1:1:QP94-N7YM : 17 July 2019), Pierres in entry for Denyse Guyon, Jul 1521; citing Birth, Tréfumel, Côtes-du-Nord, Bretagne, France, Ille-et-Vilaine et Côtes-d'Armor, France.
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