Gary Duncan, American guitarist
Gary Duncan (born Eugene Duncan, Jr., adopted at birth and named Gary Ray Grubb, September 4, 1946 – June 29, 2019) was an American guitarist, singer and songwriter. He was guitarist with The Brogues, then most notably with Quicksilver Messenger Service, where the complex interplay between himself and fellow-guitarist John Cipollina did much to define the unique sound of that San Francisco based band.