"United States Census, 1910," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MP2P-F9K : accessed 16 February 2015), Arthur E Oneil in household of William Oneil, Lake Geneva Ward 2, Walworth, Wisconsin, United States; citing enumeration district (ED) 143, sheet 5A, family 100, NARA microfilm publication T624 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,375,753.
"United States Census, 1920," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MFLW-RCJ : accessed 16 February 2015), Arthur E O'Neill in household of William O'Neill, Lake Geneva Ward 2, Walworth, Wisconsin, United States; citing sheet 4A, family 93, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,822,019.
"United States Census, 1930," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/X93Q-BD5 : accessed 16 February 2015), Eugene F Oneill in household of Mary H Oneill, Lake Geneva, Walworth, Wisconsin, United States; citing enumeration district (ED) 0018, sheet 28A, family 739, line 3, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 2615; FHL microfilm 2,342,349.
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