When Calvin Bain Evatt was born on 12 October 1892, in May, Brown, Texas, United States, his father, John Jenkins Evatt, was 35 and his mother, Martha Ellen Stout, was 29. He lived in Justice Precinct 1, Brown, Texas, United States in 1910 and Justice Precinct 2, Brown, Texas, United States in 1930. He registered for military service in 1918. He died on 30 January 1978, in Marlin, Falls, Texas, United States, at the age of 85.