↑ "United States Census, 1840," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:XHTM-3ZS : 4 October 2021), John Brock, Laurel, Kentucky, United States; citing p. 3, NARA microfilm publication , (Washington D.C.: National Archives and Records Administration, n.d.), roll ; FHL microfilm .
Find a Grave, database and images (https://www.findagrave.com/memorial/10219884/john-brock: accessed 11 February 2023), memorial page for Capt John Brock (1770–10 Jun 1858), Find a Grave Memorial ID 10219884, citing Rough Creek Cemetery, Brock, Laurel County, Kentucky, USA; Maintained by downhome31 (contributor 47158083).
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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: