Llewellyn began his club rugby days with Rhondda team Ystrad Rhondda before moving to Llwynypia. Although an unfashionable second tier club, Llwynypia had already provided two Welsh internationals, Dick Hellings and Billy Alexander, and Llewellyn joined their ranks when he was capped in 1899. In 1900 he moved to London to study at the Pharmaceutical College in Bloomsbury and joined a shabby London Welsh team. Llewellyn's arrival is seen as a turning point for the club; he was immediately made captain and turned the team from a losing side to a force to be reckoned with. On his return to Wales, Llewellyn joined first class club, Newport, who he would stay with through four seasons. On his retirement from international rugby Llewellyn returned to second class club rugby and the Rhondda when he joined Penygraig.
International career
Wales
Llewellyn made his debut for Wales against England in 1899, alongside Welsh greats Billy Bancroft and Gwyn Nicholls. It was an impressive display from Llewellyn and the team, with England thoroughly beaten and Llewellyn scoring four tries. Llewellyn scored again on his second game, which was against Scotland, and should have scored on his third match when he faced Ireland but for a poor choice by team mate Reg Skrimshire. Llewellyn was part of the 1900, 1902 and 1905 Triple Crown winning sides, but his true moment of glory was being part of the great Welsh side of 1905 which beat the Original All Blacks. He was considered a poor choice for the game by many critics as at the time of the game he had switched to Penygraig, a junior club, and he was considered too old for the wing. An uncharacteristic fumble within distance of the try line may have proven his detractors correct, but it did not affect the end result and his marking of the All BlackBilly Wallace was noted as being ruthlessly impressive.
In 1904 Llewellyn was chosen to tour Australasia alongside fellow Welsh winger Teddy Morgan under the captaincy of Bedell-Sivright. Llewellyn would play in four tests, scoring four tries in the first three tests against Australia.
Around 1905 Llewellyn opened a pharmacy in his birth town of Tonypandy. It is reported that during the 1910 Tonypandy Riot the rioters left Llewellyn's pharmacy unscathed due to his sporting celebrity. When Llewellyn died in 1973 in Pontyclun at the age of 95, he was the last of the 1905 Wales team which beat the Original All Blacks. He is remembered as a modest man who was an excellent captain for club and country and was one of the most devastating wing players in Welsh rugby history.
