John was born in 1846. He is the son of Unknown Caven.
"United States Census, 1850," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M65Q-CCH : 12 April 2016), David Cavin, Green county, Green, Kentucky, United States; citing family 446, NARA microfilm publication M432 (Washington, D.C.: National Archives and Records Administration, n.d.).
"United States Census, 1860", database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MZBF-1XT : 14 December 2017), Jas A Cavin in entry for David Cavin, 1860.
"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MCCL-S7V : 12 August 2017), John M Caven, Magisterial District 4 Brush Creek, Green, Kentucky, United States; citing enumeration district ED 57, sheet 665C, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 0416; FHL microfilm 1,254,416.
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