The headstone pictured at findagrave implies that Leo had a wife named Dorothy K., born 1913. No other information has been found about her.
Sources
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MKXG-WHK : 29 October 2015), Leo C Walsh in household of Harry Walsh, Maxwell, Sangamon, Illinois, United States; citing enumeration district (ED) ED 174, sheet 2B, NARA microfilm publication T624 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,374,339.
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MJHR-DN1 : 14 December 2015), Leo C Walsh in household of Harry Walsh, Alexander, Morgan, Illinois, United States; citing sheet 8B, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,820,395.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/KWC5-Z2Q : accessed 25 September 2016), Leo Walsh in household of Josephine Walsh, Alexander, Alexander Election Precinct, Morgan, Illinois, United States; citing enumeration district (ED) 69-1, sheet 6B, family 124, Sixteenth Census of the United States, 1940, NARA digital publication T627. Records of the Bureau of the Census, 1790 - 2007, RG 29. Washington, D.C.: National Archives and Records Administration, 2012, roll 861.
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