Charles Derek "CD" Williams (24 November 1924 – 19 September 2014) was a Welsh sportsman who played international rugby union for Wales.
Williams, a forward, wasn't capped for the Wales national rugby union team until he was 30, making his debut in 1955, against France at Colombes.
In his second Test the following year, Williams scored the try which secured the 1956 Five Nations Championship for Wales, in a 5–3 win over France in Cardiff.
[2] His try was controversial as he had come very close to the dead-ball line and television replays also showed that teammate Geoff Whitson had knocked on earlier in the passage.
[3] He played most of his club rugby for the Cardiff RFC, which he captained, making a total of 248 appearances.