John Duffy was the second son and third child born to Francis (Frank) Duffy and Margaret J Duffy. He died as a child.
John appeared in 1892 New York State census. He is 11 years old in that record, which places his birth after the 1880 census. The 1890 U.S. Census was almost entirely destroyed by fire, so this is the first census record available for him. It was taken in Lockport, New York.
The next census was the 1900 U.S. Census. In that census, Margaret Duffy answered that she had given birth to seven children, of whom six were still living.
All of her children except John can be found in the 1900 U.S. Census, indicating that he is the child who died before 1900. From this we can infer that he died sometime between 1892 and 1900.
Source of screenshots:
Duffy Family in 1892 New York State Census, seen on Ancestry.com on 14 Feb 2019.
Margaret J Duffy in 1900 US Federal Census, seen on Ancestry.com on 14 Feb 2019.
Year: 1900; Census Place: Lockport Ward 6, Niagara, New York; Roll: T623_1129; Page: 3A; Enumeration District: 64; FHL microfilm: 1241129.
Patrick Duffy (b 1812) + Elizabeth Dillon (b 1818)
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Margaret J Duffy (b 1850)+Francis (Frank) W Duffy (b 1855)
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John Duffy (b abt 1881)
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Information presented here is based on my interpretation of the sources I’ve found. As new sources are found or inaccuracies discovered, the site will be updated.
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Duffy Family History 