From records found below, she was b. abt Feb. 1870 in Columbia, IA, Parents Wilder Leonard and Ella/Nellie White.
You can find more records on this family by plugging in the names/location/estimated dates in the free search tool at https://familysearch.org/
Iowa, County Marriages, 1838-1934
Citing this Record "Iowa, County Marriages, 1838-1934," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/XJDF-BKH
C. A. Mann
Marriage 19 Dec 1900 Tama, Iowa
age: 29 est birth 1871
father: Harvey Mann mother: Electa Mann
spouse: Ida M. Leonard
age: 29 est birth 1871
father: Wilder Leonard
mother: Nellie Lenard
reference number: Vol 2 p 186
U S Census, 1870 ( July 25, 1870) Tama city, Columbia, IA
Citing this Record "United States Census, 1870," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MDVB-LZJ
Wilder Leonard M 30y MA
Ella Leonard F 19y OH
Ida M Leonard F 5mos IA = birth abt Feb., 1870
Iowa, County Births, 1880-1935
Citing this Record "Iowa, County Births, 1880-1935," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/XV8B-7HG
Leonard Male
Birth 28 May 1883 Columbia Twp., Tama, IA
father: W. Leonard mother: Nellie White