When William Betts Bragg was born on 30 March 1855, in Lunenburg, Virginia, United States, his father, David Blackstone Bragg, was 45 and his mother, Sarah G Keeton, was 32. He married Nannie Etta Roach on 23 December 1885, in Lunenburg, Virginia, United States. They were the parents of at least 5 sons and 6 daughters. He lived in Darvills, Dinwiddie, Virginia, United States in 1880 and Lewiston Magisterial District, Lunenburg, Virginia, United States for about 30 years. He died on 30 March 1936, in Lunenburg, Virginia, United States, at the age of 81.