FindaGrave for John George Keener gives his birthplace as Baden-Württemberg, wife's maiden name Hettinger.
Find A Grave, database and images (
https://www.findagrave.com : accessed
20 August 2018), memorial page for John George Keener (1803–1879), Find A Grave Memorial no.
94379852, citing Maple Grove Cemetery, Thompson, Geauga County, Ohio, USA ; Maintained by Find A Grave (contributor
8) .
Marriage of Johann Georg Kuehner and Rosina Elisabetha Hettinger, also gives their father's names:
"Deutschland Heiraten, 1558-1929," database,
FamilySearch (
https://familysearch.org/ark:/61903/1:1:VCY6-M25 : 11 February 2018), Johann Georg Kuehner and Rosina Elisabetha Hettinger, 25 Feb 1827; citing Evangelisch, Mittelschefflenz, Mosbach, Baden; FHL microfilm 1,189,230.
Birth of son Carl Ludwig, 1827:
"Deutschland Geburten und Taufen, 1558-1898," database,
FamilySearch (
https://familysearch.org/ark:/61903/1:1:N5JM-NMJ : 10 February 2018), Carl Johann Georg Kuehner in entry for Carl Ludwig Kuehner, ; citing Unterschefflenz, Baden, Germany; FHL microfilm 1,189,229.
Birth of daughter Katharina Elisabetha, 1832:
"Deutschland Geburten und Taufen, 1558-1898," database,
FamilySearch (
https://familysearch.org/ark:/61903/1:1:NLQ7-4L5 : 10 February 2018), Georg Kuehner in entry for Katharina Elisabetha Kuehner, ; citing Unterschefflenz, Baden, Germany; FHL microfilm 1,189,229.
This is great stuff. I might have to make these profiles myself.