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DNA Connections
It may be possible to confirm family relationships with William by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
However, there are no known yDNA or mtDNA test-takers in his direct paternal or maternal line.
It is likely that these autosomal DNA test-takers will share some percentage of DNA with William:
What valid evidence is there that "William Joseph" Thompson was the son of William and Johanna? Even Daniel-123 (mother) doesn't acknowledge William Joseph as a child. Be wary of one child with two given names in this time period, especially if siblings have only one given name.
edited by Eric Henderson