S. R. Gannon
Might be the S.R. Gannon b. June 23, 1927; died Aug. 23, 2000 (son of George Washington Gannon and Zelma Gannon) that is referenced in <a href="https://www.geni.com/people/S-Gannon/6000000002029208065">Geni</a> and <a href="https://www.ancestry.com/1940-census/usa/Tennessee/S-R-Gannon_1bc45r">ancestry.com</a>. (This S.R. had a younger brother named Jessie.)