Nancy Elizabeth was born in 1752. She was the daughter of Thomas Smith. She married Sherrod Mayes on November 25, 1773 in Guilford County, NC. To this union 10 children were born in Grainger County Tennessee. She passed away in 1846. 
Thomas Smith made his Will January 10, 1797 (see Old Wills # 15, Rockingham County Archives North Carolina). In his Will, Thomas left his wife the Estate both real and personal during her natural life.
He left Drury, his son 10 schillings. He left his daughters and granddaughters furniture and feather bedding and six negroes and their offspring as specified.
He willed his daughter Elizabeth (wife of Sherod Mayes) one negro girl named Lettice during her natural life and after her death to be equally divided between her daughters.
Thomas willed his grandson, Isaac, son of Zacheriah, one negro man named Tom,
He willed his daughter Mary one negro slave named Oal.
He willed his daughter Phebe three slaves named Abram, Frank and Peter.
Thomas appointed his son Drury Smith and his grandson Stephen Smith to be the Executors of his Estate. The will was witnesses by Drury Smith, John Moore and Umphrey Brooks.
It may be possible to confirm family relationships with Betty 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 Betty: