"United States Census, 1870," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MNS5-3N3 : 17 October 2014), M Mallonee, Maryland, United States; citing p. 15, family 123, NARA microfilm publication M593 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 552,067.
"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MN3Y-MP5 : 14 July 2016), M V Malonee, District 4, Anne Arundel, Maryland, United States; citing enumeration district ED 23, sheet 126C, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 0494; FHL microfilm 1,254,494.
"Maryland Marriages, 1666-1970," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:F4VQ-M8L : 12 December 2014), John B. Mallonee and Sally M. Martin, 12 Nov 1890; citing Saint Annes Parish,Annapolis,Anne Arundel,Maryland, reference ; FHL microfilm 13,281.
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 DNA with John: