William John Spiller (8 July 1886 – 9 June 1970), was a Welsh rugby union player and cricketer.
His greatest achievements were in rugby, where he won ten international caps at centre for Wales between 1910 and 1913,[1] but his short first-class cricket career was also notable as he was the first man to score a century for Glamorgan after their elevation to first-class status in the 1921 season.
Throughout July and August Spiller played regularly for his county, and in late July he became the first Glamorgan batsman to reach three figures in the first-class game when he hit 104 in the second innings against Northamptonshire, albeit in a match the Welsh county lost by 244 runs.
That was to prove the high point of Spiller's cricketing career, and except for an innings of 58 against Sussex in August, he never again passed 30 in the first-class game.
Spiller died in St. Fagans, the village of his birth, a month short of his 84th birthday.