Winnifred was born in 1888 in Iowa. She died in 1911.
Sources
Find a Grave, database and images (https://www.findagrave.com/memorial/100651377/winifred-m-keenan : accessed 12 October 2021), memorial page for Winifred M. Keenan (1888–1911), Find a Grave Memorial ID 100651377, citing Saint Clair Cemetery, Greensburg, Westmoreland County, Pennsylvania, USA ; Maintained by field_iii (contributor 47386013) .
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MGD7-8P8 : accessed 12 October 2021), Joseph H Keenan in household of Mary I Keenan, Pittsburgh Ward 4, Allegheny, Pennsylvania, United States; citing enumeration district (ED) ED 330, sheet 6B, family 114, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 1300; FHL microfilm 1,375,313.
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MS1K-R5P : accessed 12 October 2021), Joseph H. Keenan Jr. in household of Joseph H. Keenan, Precinct 8 Pittsburgh city Ward 13, Allegheny, Pennsylvania, United States; citing enumeration district (ED) 160, sheet 7B, family 151, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,241,359.
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DNA Connections
It may be possible to confirm family relationships with Winifred by comparing test results with other carriers of her ancestors' mitochondrial DNA.
However, there are no known mtDNA test-takers in her direct maternal line.
It is likely that these autosomal DNA test-takers will share some percentage of DNA with Winifred: