At the time of the 1900 US Census, head of household Heinrich Weidenbach Jr. (age 36, born in Russia) was living in Lesterville Township & T.96-R.57 Lesterville village, Yankton, South Dakota, United States with his wife, Elisabeth Weidenbach (age 30, born in Russia), their six children: Emil Weidenbach (age 11, born in South Dakota), Bertha Weidenbach (age 7, born in South Dakota), Clara Weidenbach (age 5, born in South Dakota), Theotor Weidenbach (age 3, born in South Dakota), Herbert Weidenbach (age 1, born in South Dakota), and their servant, Christian Hauck (age 16, born in Russia). 
↑ "South Dakota, Department of Health, Index to Births 1843-1914 and Marriages 1950-2016," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:QKDD-QG8K : 2 September 2015), Herbert Weidenbach, 22 Sep 1899; citing Birth, Yankton, South Dakota, United States, South Dakota Department of Health, Pierre.
↑ "United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MMRF-H33 : accessed 15 September 2017), Herbert Weidenbach in household of Heinrich Weidenbach Jr., Lesterville Township & T.96-R.57 Lesterville village, Yankton, South Dakota, United States; citing enumeration district (ED) 347, sheet 8A, family 134, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,241,555.
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It may be possible to confirm family relationships with Herbert by comparing test results with other carriers of his ancestors' Y-chromosome or mitochondrial DNA.
However, there are no known yDNA or mtDNA test-takers in his direct paternal or maternal line.
It is likely that these autosomal DNA test-takers will share some percentage of DNA with Herbert: