"United States Census, 1850," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MDZ6-KPN : 4 April 2020), John Vaughn in household of John Vaughn, Miller county, Miller, Missouri, United States; citing family 187, NARA microfilm publication M432 (Washington, D.C.: National Archives and Records Administration, n.d.).
(16 Mar 1871 marriage to Mary Elizabeth Cooper) "Missouri Marriages, 1750-1920", database, FamilySearch (https://familysearch.org/ark:/61903/1:1:V2DL-293 : 18 January 2020), Jackson Vaughn, 1871.
Find a Grave, database and images (https://www.findagrave.com : accessed 15 August 2020), memorial page for John B Vaughan (16 Jan 1836–18 May 1872), Find a Grave Memorial no. 57101424, citing Livingston Cemetery, Iberia, Miller County, Missouri, USA ; Maintained by Nancy Arnold Thompson (contributor 47192413) .
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DNA Connections
It may be possible to confirm family relationships with John by comparing test results with other carriers of his Y-chromosome or his mother's 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 John: