Thank you to Janine O'Keeffe for creating WikiTree profile O'Halloran-77 through the import of Tilley O_Keeffe Draft (1).ged on Jul 6, 2013. Click to the Changes page for the details of edits by Janine and others.
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DNA Connections
It may be possible to confirm family relationships with John 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 John: