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- [S19]  1900 US Federal Census, (www.ancestry.com).
 
Name: Otto Cook Home in 1900: Washington, Bon Homme, South Dakota Age: 8 Birth Date: Apr 1892 Birthplace: South Dakota Race: White Ethnicity: American Gender: Male Relationship to Head of House: Son Father's Name: Christian Father's Birthplace: Russia Mother's Name: Anna Mother's Birthplace: Russia Marital Status: Single Residence : Scotland City, Bon Homme, South Dakota 
 
  
- [S30]  1910 US Federal Census, (www.ancestry.com).
 
Name: Otto E Kuck Age in 1910: 18 Estimated birth year: abt 1892 Birthplace: South Dakota Relation to Head of House: Son Father's Name: Christ Father's Birth Place: Russia Mother's Name: Anna M Mother's Birth Place: Russia Home in 1910: Washington, Bon Homme, South Dakota Marital Status: Single Race: White Gender: Male 
 
  
- [S24]  1920 US Federal Census, (www.ancestry.com). 
 
  
- [S25]  1930 US Federal Census, (www.ancestry.com). 
 
  
- [S891]  World War I Draft Registration Cards, 1917 - 1918, (www.ancestry.com).
 
Name: Otto Emel Kuk City: Sioux City County: Woodbury State: Iowa Birthplace: South Dakota;United States of America Birth Date: 12 Apr 1893 Race: Caucasian (White) FHL Roll Number: 1643354 DraftBoard: 2 
 
  
- [S366]  South Dakota Births, 1856-1903.
 
Name: Otto Emil Kuk Birth Date: 12 Apr 1893 Gender: Male County: Bon Homme Father's Name: Christian Kuk Mother's Name: Ann Becker File Date: 7 Oct 1942 
 
  
- [S888]  Social Security Death Index 1935 - Current, (www.ancestry.com).
 
Name: Otto Kuk SSN: 505-44-6031 Last Residence: Nebraska Born: 12 Apr 1893 Died: May 1965 State (Year) SSN issued: Nebraska (1954) 
  
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