Sydney Arthur Williams (17 April 1918 – 28 August 1976) was a Welsh dual-code international rugby union and professional rugby league footballer who played in the 1930s, 1940s and 1950s.
He played representative level rugby union (RU) for Wales, and at club level for Aberavon RFC, as a wing,[1][2] and representative level rugby league (RL) for Wales, and at club level for Salford, as a fullback, wing, or centre.
[3][4] He also appeared for Wigan and Oldham RLFC as a World War II guest player.
[5] Williams was born in Aberavon, Wales, and he died aged 58 in Neath, Wales.
Syd Williams won three caps for Wales (RU) while at Aberavon RFC in 1939 against England, Scotland, and Ireland,[1] and won five caps for Wales (RL) while at Salford from 1940 to 1952.