When Nannie Belle Yelton was born on 29 December 1885, in Benton City, Audrain, Missouri, United States, her father, Charles Thomas Yelton, was 31 and her mother, Missouri Frances Smith, was 35. She married John Wesley Keith on 5 April 1903, in Missouri, United States. They were the parents of at least 5 sons and 1 daughter. She lived in Montgomery, Missouri, United States in 1935 and Montgomery Township, Montgomery, Missouri, United States in 1940. She died in 1971, at the age of 86, and was buried in Wellsville Cemetery, Wellsville, Montgomery, Missouri, United States.