| Sources |
- [S408] Ancestry.com, U.S., Cemetery and Funeral Home Collection, 1847-2015, (Name: Ancestry.com Operations Inc; Location: Provo, UT, USA; Date: 2011;), Publication Date: 19/ Jan/ 2015; Publication Place: Kirkersville, Ohio, USA; URL: http://www.schoedinger.com/obituaries/John-Callahan-4/.
Record for John Ernest Callahan
https://search.ancestry.com/cgi-bin/sse.dll?db=2190&h=372473901&indiv=try
- [S198] Ancestry.com, U.S., Find A Grave Index, 1600s-Current, (Name: Ancestry.com Operations, Inc.; Location: Provo, UT, USA; Date: 2012;).
Record for John Ernest Callahan
https://search.ancestry.com/cgi-bin/sse.dll?db=60525&h=116109768&indiv=try
- [S775] Ancestry.com, Kentucky, Birth Index, 1911-1999, (Name: Ancestry.com Operations Inc.; Location: Provo, UT, USA; Date: 2006;).
Record for John E Callahan
https://search.ancestry.com/cgi-bin/sse.dll?db=8788&h=644847&indiv=try
- [S371] Ancestry.com, Virginia, Marriage Records, 1936-2014, (Name: Ancestry.com Operations, Inc.; Location: Provo, UT, USA; Date: 2015;), Virginia Department of Health; Richmond, Virginia; Virginia, Marriages, 1936-2014; Roll: 101172847.
Record for Mark Ernest Callahan
https://search.ancestry.com/cgi-bin/sse.dll?db=9279&h=11917823&indiv=try
- [S71] Cousin Count, 5th Cousins.
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