James A. Cunningham, b. OH married Mary Seal b. VA in Ohio in 1849.(1) James b. OH and Mary b. VA can be found residing in Timber Hill, Bourbon County, Kansas in the 1880 US Census, where his birthplace is listed as Ohio, his father's birthplace as Ohio, and his mother's birthplace listed as Virginia. In this same census, Mary's birthplace is listed as Virginia, and both her parents also as Virginia.(2) This does not coincide with the family history of the father you presently have John connected to, which states that his son John, who was born in South Carolina, died in Tennessee. I cannot find a John Cunningham born in South Carolina in a US Census residing in Kansas at all. In the 1900 US Census, John Cunningham can be found residing in the home of his daughter and son-in-law, Edward and Mary Coykendall, in Mill Creek Township, Bourbon County, Kansas.(3) Again, his birthplace is listed as Ohio, his father's as Ohio, and his mother's as Virginia. Note that daughter Mary's birthplace is recorded as Ohio, her father's birthplace as Ohio, and her mother's birthplace as Virginia. This is consistent with John Cunningham, b. Ohio and Mary Seal, b. Virginia. The two sons that are linked to John and Mary Cunningham are probably the sons of John of South Carolina and Mary Hampton, his wife, but this couple in the graveyard in Bourbon County, Kansas does not appear to be the fellow from South Carolina, who is probably interred in Tennessee, and Mary Coykendall is not the daughter of John of South Carolina and Mary Hampton, but is indeed the daughter of the couple in the Bourbon County Kansas graveyard, who are John Cunningham and Mary Seal. Thank you for kindly reviewing the documentation provided.

(1) "Ohio, County Marriages, 1789-2013," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:X87M-65J : 26 August 2019), John A. Cunningham and Mary Seal, 17 Mar 1849; citing Intended Marriage, Greene, Ohio, United States, 131, Franklin County Genealogical & Historical Society, Columbus; FHL microfilm.

(2) "United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MFPK-ZSF : 7 September 2017), John A Cunningham, Timber Hill, Bourbon, Kansas, United States; citing enumeration district ED 35, sheet 346B, NARA microfilm publication T9 (Washington, D.C.: National Archives and Records Administration, n.d.), FHL microfilm 1,254,374.

(3) "United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MMTS-TVD : accessed 20 October 2019), Edward Coykendall, Mill Creek Township, Bourbon, Kansas, United States; citing enumeration district (ED) 46, sheet 6B, family 117, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,240,471.
Contributed by: fleshingoutthetree (49280078) on 10-20-2019.
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1900 United States Federal Census
Name John A Cunningham
Age 75
Birthdate Sep 1824
Birthplace Ohio, USA
Home in 1900 Mill Creek, Bourbon, Kansas
Sheet Number 6
Number of Dwelling in Order of Visitation 117
Family Number 117
Race White
Gender Male
Relation to Head of House Father-in-law
Marital Status Widowed
Father's Birthplace Ohio, USA
Mother's Birthplace Virginia, USA
Can Read Y
Can Write Y
Can Speak English Y
Neighbors View others on page
Household Members (Name) Age Relationship
Edward Coykendall
54 Head
Mary J Coykendall
41 Wife
Bill M Coykendall
21 Daughter
Clara E Coykendall
16 Daughter
John O Coykendall
11 Son
Mary E Coykendall
8 Daughter
Goldie N Coykendall
4 Daughter
Ira Hammer
22 Farm Laborer (Laborer)
John A Cunningham 75 Father-in-law
1910 United States Federal Census
Name John Cunningham
[John Cuminghan]
Age in 1910 85
Birth Date 1825
[1825]
Birthplace Ohio
Home in 1910 Box Ward 1, Cedar, Missouri, USA
Sheet Number 16a
Race White
Gender Male
Relation to Head of House Father
Marital Status Widowed
Father's Birthplace Ohio
Mother's Birthplace Virginia
Native Tongue English
Able to read Y
Able to Write Y
Enumeration District Number 0052
Survivor of Union or Confederate Army or Navy
Enumerated Year 1910
Neighbors View others on page
Household Members (Name) Age Relationship
Elizabeth Gillette
60
Head
John Cunningham 85 Father