William Keith Relf (22 March 1943 – 12 May 1976) was an English musician, best known as the lead vocalist and harmonica player for rock band the Yardbirds. He then formed the band Renaissance with his sister Jane Relf, the Yardbirds ex-drummer Jim McCarty and ex-The Nashville Teens keyboardist John Hawken. Description above from the Wikipedia article Keith Relf, licensed under CC-BY-SA, full list of contributors on Wikipedia.