She is listed as Jennie Johnson, wife of "Gentleman" John Riley, #77 on the pedigree chart in the book Morris Fork Kentucky: Family Stories and Genealogies from Breathitt County and Eastern Kentucky. This source gives her birth date as circa 1804 and her date of death as December 12, 1858 in Breathitt County, Kentucky. This source also confirms her parents' names.
O'Connor, William. Dozens of Cousins (1988)
Brøderbund Software, Inc. Census Microfilm Records: Kentucky 1850 National Archives of the United States. Brøderbund Software, Inc. (1998) CD# 303, Disk 1, Page 2019
Morris, Leon. Morris Fork Kentucky:
Family Stories and Genealogies from Breathitt County and Eastern Kentucky. Elkhart, Indiana, 1995.
It may be possible to confirm family relationships with Jenny 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 DNA with Jenny: