In 1900, Williams became a Triple Crown winning player when he represented Wales in all three of the games during the Home Nations Championship.

Williams was the second player from Pontymister to represent Wales, following Joseph Booth who earned a single cap in 1898.

Williams was first chosen for the Welsh squad as part of 1900 Home Nations Championship, playing in the opening game against England.

Wales beat Scotland, scoring four tries in the process, with Williams among the scorers, his first international points.

The final game, away to Ireland, decided the Championship, and Wales took the Triple Crown with the only points coming from Swansea's George Davies.