Mary Frances Hathcock was born in Lincoln County, Tennessee in 1851. She was the youngest child of Charles and Frances Hathcock and appears first in the 1860 Census. of Limestone County, Alabama, living with her parents. The 1870 Census of Lincoln County, Tennessee includes a Frances Hathcoat living in the household of F. Hathcoat. This is believed to be Mary Frances Hathcock and her mother Frances. No further information is presently available on Mary Frances Hathcock.2243

However, the 1880 census shows that she was living with her brother Henry at that time (Note added 7 December 2016, Clayton Heathcock):

1880 Lincoln Co TN

Name Age
Henry Hathcock 57 widower, b TN, f and m both b TN
W. J. Hathcock 32 son
Martha Hathcock 30 dau-in-law
James H. Hathcock 5 grandson
Martha M. Hathcock 4 granddau
Sarah L. Hathcock 1 granddau
Mary J. Hathcock 1 granddau
Charley Hathcock 20 son
Mary Hathcock 40 sister