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Sources
↑ First-hand information as remembered by Patricia Cochrane, Saturday, November 22, 2014. Replace this citation if there is another source.
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DNA Connections
It may be possible to confirm family relationships with Guillaume by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
However, there are no known yDNA test-takers in his direct paternal line.
Mitochondrial DNA test-takers in the direct maternal line: