Iolo Ceredig Jones (born 2 August 1947)[1] is a Welsh former international chess player and is notable as the co-author of the only Welsh language chess manual, A chwaraei di wyddbwyll?, which he wrote with his father, T. Llew Jones.[2]
Jones has competed at 14 consecutive Chess Olympiads between 1972 and 1998. He won a gold medal for his performance at the Olympiad Novi Sad, Yugoslavia, in 1990. He was also the joint Welsh champion in 1982-3. In 2011 he took a break from retirement and participated in the European Team Chess Championship for the Welsh team.
He is also the brother of the political activist and writer, Emyr Llewelyn.