Master Ship Steamfitter, Brooklyn Navy Yard.
My maternal Grandfather: Denis Hickey
Born: USA March 5, 1882
Father: Timothy Hickey
Mother: Mary Mahoney
Married: Mary F. McCaffery
Died: December 10, 1961 Age: 79 years 9 months
Buried: Maryrest Cemetery, Mahwah, NJ.
Sources
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MSNS-NVL : accessed 7 April 2019), Mary Hickey in household of Dennis Hickey, Borough of Brooklyn, Election District 6 New York City Ward 20, Kings, New York, United States; citing enumeration district (ED) 310, sheet 1A, family 5, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,241,057.
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DNA Connections
It may be possible to confirm family relationships with Denis 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 Denis: