William O'Connor was born in about 1913. He is inferred to be the son of William O'Connor and Annie McCarthy.
Sources
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MJY4-9L4 : accessed 16 December 2015), William O Connor in household of Annie O Connor, Manhattan Assembly District 3, New York, New York, United States; citing sheet 21B, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,821,190.
"United States Census, 1930", database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:X4K6-LQF : accessed 16 December 2015), William O'Connor in entry for Annie O' Connor, 1930.
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