Some say it was Gene Simmons from Kiss. Some say it was Dio. It was in fact that Ronnie James Dio and Gene Simmons were one of the first to have started using that sign. Although, Dio was the main contributor in making it a popular sign.
Rock Star Ronnie James Dio was born on July 10, 1942. His nickname is Dio and he is relatively small in stature for a male, standing at only five feet four inches tall. I don't know which Ronnie your talking about, and maybe your talking about this Ronnie.