Her death certificate lists her father as William C. Botzer. William was in fact her brother. Her father was John Botzer who appears to have died between 1860 - 1870.
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Judging from the 1860 census it appears her given name was actually Wilhelmina and as with her mother, it was shortened to Minnie.
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Family Members
Parents
Wilhelmina Sophia Reiter Botzer
1833–1886
Spouse
Allison C. Klingensmith
1850–1920
Siblings
Caroline F Botzer Roihan
1855–1936
Mary Elizabeth Botzer Klingensmith
1856–1922
William Charles Botzer
1861–1947
Cecelia L. Botzer Hook
1863–1947
John Adam Botzer
1865–1931
Children
Verna L. Klingensmith Meeder
1886–1941
Elwin Harold Klingensmith
1889–1957