William Berridge Welsh (11 February 1907 – 27 February 1987) was a Scottish international rugby union player, and later rugby league footballer, who played for Scotland and the Lions.Welsh scored his début try in his first international against the 1927-8 Waratahs from New South Wales, and was capped 21 times for Scotland. He also played for Hawick. He toured with the 1930 British Lions, including a match against the All Blacks, and was the only Scot on the squad. The Welsh player Ivor Jones, who played alongside him in the tour, described Willie Welsh as "one of the truly great forwards".