Following contributed by pomnik

1900United States Federal Census, Barnett, Dewitt, Illinois
Elmer E Cantrell: Head, Age: 38, /Birthdate: Aug. 1861, Birthplace: Illinois, Marriage Date: 1885
Jennie Cantrell: Wife, Age: 38, Birthdate: Apr. 1862, Birthplace: Illinois, Marriage Date: 1885, Mother of how many children: 5, Mother of Living Children: 5
Rayper Z Cantrell: Son, Age: 14, Birthdate: Nov. 1885, Birthplace: Illinois
Floyd Cantrell: Son, Age: 12, Birthdate: Nov. 1887, Birthplace: Illinois
Alma Cantrell: Daughter, Age: 9, Birthdate: Jun 1890, Birthplace: Illinois
Abbaline Cantrell: Daughter, Age: 8, Birthdate: Feb. 1892, Birthplace: Illinois
Jennie Cantrell: Daughter, Age: 4, Birthdate: Apr. 1896, Birthplace: Illinois

1910 United States Federal Census, Clintonia, DeWitt, Illinois
Elmer E Cantrell: Head, Age: 48, Birthdate: abt. 1862, Birthplace: Illinois
Jennie E Cantrell: Wife, Age: 48, Birthdate: abt. 1862, Birthplace: Illinois
Floyd S Cantrell: Son, Age: 22, Birthdate: abt. 1888, Birthplace: Illinois
Alma F Cantrell: Daughter, Age: 19, Birthdate: abt. 1891, Birthplace: Illinois
Abelena Cantrell: Daughter, Age: 18, Birthdate: abt. 1892, Birthplace: Illinois
Jennie Cantrell: Daughter, Age: 14, Birthdate: abt. 1896, Birthplace: Illinois
Elmer Cantrell: Son, Age: 8, Birthdate: abt. 1902, Birthplace: Illinois
James R Cantrell: Son, Age: 4, Birthdate: abt. 1906, Birthplace: Illinois

South Dakota Marriages
Frank Marshall Kouf, Age: 30 Bachelor, Spouse: Genevieve Cantrell, Age:23 Maiden, Marriage Date: 27 Sep 1919, County: Beadle

1920 United States Federal Census, Valley, Beadle, S.D.
Jacob M Kouf: Head, Age: 66, Birthdate: abt. 1854, Birthplace: Pennsylvania
Hattie Kouf: Wife, Age: 50, Birthdate: abt. 1870, Birthplace: Germany
Frank Kouf: Son, Age: 30, Birthdate: abt. 1890, Birthplace: S.D., Marital Status: Married
Bulah Kouf: Daughter, Age: 27, Birthdate: abt. 1893, Birthplace: S.D.
John Kouf: Son, Age: 25, Birthdate: abt. 1895, Birthplace: S.D.
Jennie Kouf: Daughter-in-law, Age: 23, Birthdate: abt. 1897, Birthplace: Iowa, Marital Status: Married,
Jacob Kouf: Son, Age: 23, Birthdate: abt. 23, Birthplace: S.D.
Charlie Kouf: Son, Age: 20, Birthdate: abt. 20, Birthplace: S.D.

1930 United States Federal Census, Valley, Beadle, S.D.
Frank M Kouf: Head, Age: 40, Birthdate: abt. 1890, Birthplace: S.D.
Jennie L. Kouf: Wife, Age: 33, Birthdate: abt. 1897, Birthplace: Illinois
Betty Kouf: Daughter, Age: 9, Birthdate: abt. 1921m Birthplace: S.D.

USSSDI Findagrave 139586244
Jennie Kouf, Born: 12 Apr. 1896, Died Jan 1974