John Grantley Cooper (amụrụ na 14 Mee 1954) bụ onye Welsh chess International Master (IM) (1984), onye mmeri Welsh Chess Championship ugboro iri (1976, 1977, 1978, 1984, 1985, 1992, 1993, 1994, 1995, 1996), onye mmeri ọlaọcha nke Chess Olympiad ugboro abụọ (1976
, 1984).