"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MJ11-GB9 : accessed 5 April 2018), William Duggan in household of Francis J Fitzgerald, Queens Assembly District 2, Queens, New York, United States; citing ED 103, sheet 28A, line 18, family 100, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 1230; FHL microfilm 1,821,230.
Is William your ancestor? Please don't go away! Login to collaborate or comment, or ask our community of genealogists a question.
Sponsored Search by Ancestry.com
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: