"Berthe. was the name of Robert de Vitré's second wife ... no primary source ......

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"Berthe. was the name of Robert de Vitré's second wife ... no primary source ... found which indicates that this was also the name of his first wife" (Cawley, 2006).[1] ... That said, authors like Jessee (2000), use "Bertha" to identify Guerin's daughter.[2]

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