not sure of parents or any information of where about or even if he came to USA. Wife and child living alone in 1855 in Salem, MA.
Found some possible parents in the Irish Catholic Church rolls.
Sources
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DNA Connections
It may be possible to confirm family relationships with Cornelius 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 Cornelius: