His name is spelled as Rupert in the 1880 census.
↑ "United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MXNS-XVB : 22 August 2017), Rupert Mansker in household of Jacob Mansker, Thebes, Alexander, Illinois, United States; citing enumeration district ED 5, sheet 126B, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 0175; FHL microfilm 1,254,175.
It may be possible to confirm family relationships with Rupert 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 DNA with Rupert: