I believe that WWL actually stood for Wonderful Words of the Lord. Their slogan on the air until the University sold them was "The Apple of your Ear"
Also, I am pretty sure that WESC has always been licensed to Greenville. The call sign stood for We Entertain South Carolina. It began in Greenville on 660 with 5KW daytime only. In the early 1960s, it increased to 10,000 watts daytime, then SC's most powerful AM station. It didn't reach 50KW daytime until the 1980s. Even now, the station operates with 10,000 watts directional during critical hours (2 hours prior to sunset and 2 hours after sunrise. It has a special pre sunrise authorization granted with the cooperation of the 660 Clear Channel AM in New York which used to be WNBC. The founder and owner of WESC lived in New York, I think he was in the advertising business, and knew the movers and shakers at NBC. The 500 watts pre sunrise is also directional to protect the 660 NYC signal.