Mary Francis Underwood was born March 29,1847, the daughter of Sevier Underwood and Charlotte Yeager (the daughter of Augustine Yeager and Margaret McGlathery). Sevier Underwood and his family were early settlers of Itawamba County settling south of the Natchez Trace in northwestern Itawamba County having come from Morgan County, Alabama.
Sevier Underwood was born May 4, 1806 in Anderson County, Tennessee. He was the son of John and Susanna Underwood. John Underwood served as sheriff of Anderson County, Tennessee from 1801 until 1812. Sevier died in Itawamba County on December 6, 1865. The Underwood’s were early settlers of eastern Tennessee having come across the mountains from North Carolina.
Mary Francis Underwood married Columbus Lafayette Grissom (born June 14, 1848, the son of Henry Grissom and Julia Johnson) in Itawamba County. Mary Frances Underwood, known as Fanny, died in Itawamba County on February 17, 1929 and was buried in Oak Grove Cemetery in the Ratliff Community.