Stephan Henry Keck was the son of Walter Cheston Keck and Mary Saphrona Jane Harmon. He married Sarah Janette Stegall. They had the following children: Mary Eleanor, Steven Edward, Arthur Ellis, Gayle Ernest, Betty Eva, Jo Evelyn, Marjorie Eileen, Gloria Evadeen, Lytle Elbert, Wynonia Ernestine, and Sally Ellen.