When Nathan Braxton Gregg was born on 26 November 1893, in Samantha, Tuscaloosa, Alabama, United States, his father, Millard F. Gregg, was 32 and his mother, Fredonia Augusta Blackburn, was 32. He had at least 4 sons with Mary Alma Broughton. He lived in Marcumville, Tuscaloosa, Alabama, United States in 1900 and Election Precinct 7 Cowden (Dodsons), Tuscaloosa, Alabama, United States for about 30 years. He died on 29 November 1970, in Tuscaloosa, Tuscaloosa, Alabama, United States, at the age of 77, and was buried in Arbor Springs Cemetery, Tuscaloosa, Alabama, United States.