When Nellie Roberts was born on 18 January 1912, in Gillis, Calcasieu, Louisiana, United States, her father, Joseph H Roberts, was 29 and her mother, Elberta Gilley, was 18. She married Herman David Theriot in 1931, in Louisiana, United States. They were the parents of at least 2 daughters. She lived in Ward Three, Allen, Louisiana, United States for about 10 years and Ward One, Calcasieu, Louisiana, United States in 1940. She died on 10 December 1986, in Moss Bluff, Calcasieu, Louisiana, United States, at the age of 74.