You are correct -- John Cobb Norwood was married to Mary Elizabeth Norwood - she was a Norwood and married a Norwood.
They had 6 children -- 3 boys and 3 girls. The girls were Johnnie Susan; Alabama; and Minnie B. The boys were Jack (Ed Foster was his name, but was called Jack), Willie, and Burdette (my father). Jack Norwood was married to Myrtie Kynard - they had no children; Minnie B was married to Roscoe Kelley - 3 children -- Annie Ruth, Harvey, and R B; Willie was married 2 or 3 times - had one daughter Billie Jean. Alabama was married to Raburn McDonald - had 5 kids - Vernon, Morris Troy, Eldon Ray, Joyce Fern and Willie Faye. Burdette Norwood was married to Isolene Brown - had 5 kids - Frances Nadine; Jerry Hugh, Richard Colvin, Theresa Dianne, and Ronald Glenn. Johnnie was married to A J Shadoin --her children were Henry, Ben, George Merle, John,Bernard, Mary Gladys, Bernice, Ruth and Ruby (all that I can remember).