When Mary Vann Dorminy was born on 15 October 1808, in Montgomery, Georgia, United States, her father, John Dorminy, was 39 and her mother, Rachel Bradford, was 38. She married William G. Fletcher on 13 December 1832, in Irwin, Georgia, United States. They were the parents of at least 9 sons and 4 daughters. She lived in Irwin, Georgia, United States for about 10 years. She died on 18 November 1860, in Alapaha, Berrien, Georgia, United States, at the age of 52, and was buried in Fletcher Cemetery, Irwin, Georgia, United States.