The Birth and Death Date is a rough estimate. See the text for details.
Sources
"Ohio, County Marriages, 1789-2013," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XD4V-T28 : accessed 14 August 2015), Samuel R. Koontz and Catharine R. Donnally, 14 Aug 1845; citing Gallia, Ohio, United States, reference p24; county courthouses, Ohio; FHL microfilm 317,652.
"Ohio, Deaths, 1908-1953," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:X8R6-GS7 : accessed 14 August 2015), Katherine Donally in entry for Addie Hamilton, 17 Jan 1930; citing Columbus, Franklin, Ohio, reference fn 2269; FHL microfilm 1,992,082.
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DNA Connections
It may be possible to confirm family relationships with Catharine by comparing test results with other carriers of her mitochondrial DNA.
However, there are no known mtDNA test-takers in her direct maternal line.
It is likely that these autosomal DNA test-takers will share some percentage of DNA with Catharine: