John Lewis Williams (3 January 1882 – 12 July 1916) was a Welsh international wing who played club rugby for Cardiff Rugby Football Club.
A three times Triple Crown winner, out of seventeen appearances for Wales he was on the losing side only twice.
Williams began his rugby career professionally with Newport RFC, playing for them from 1899 to 1903.
He joined Cardiff RFC after moving to the town, and spent the rest of his career with the team.
Shortly after joining Cardiff, he was invited to play for the Wales national rugby union team in 1906.
He continued to represent Wales until 1911 becoming the country's top points scorer.
Shortly after retiring, he enlisted in World War I, and was wounded in the Battle of the Somme, dying in France on 12 July 1916.