I found her family in the 1930 US Census, and as in the 1921 Canadian Census already linked in her profile, Doris's surname was recorded as Madden.
"United States Census, 1930," database with images, FamilySearch (
https://familysearch.org/ark:/61903/1:1:X79B-FD5 : accessed 30 March 2018), Dorris Madden in household of Sylvester B Madden, Detroit (Districts 0251-0500), Wayne, Michigan, United States; citing enumeration district (ED) ED 481, sheet 8B, line 68, family 39, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 1052; FHL microfilm 2,340,787.