Pipe Major William Collie Ross MBE (1878 - 1966) was a Scottish bagpipe player.

[1][2] He was taught by his maternal uncle Aeneas Rose, piper to the Duke of Atholl, but also received tuition from both his parents, in addition to taking lessons at Blair Castle during the school holidays.

They had a son William who died aged about 7 (probably of cystic fibrosis) and a daughter Cecily who won Mòd Medals for her piano playing.

[3] The composition 'Corriechoillie's 43rd Welcome to the Northern Meeting' is often wrongly attributed to Willie Ross, but was in fact composed by an earlier William Ross (1823-1891) from the parish of Knockbain in Ross-shire, who was Pipe Major of 42nd Royal Highlanders (Black Watch), and became Piper to Queen Victoria on the 10th May 1854, a post which he continued to occupy up till the time of his death on 10th June 1891, at the age of 69.

The Corriechoillie in question is the notorious livestock drover and landowner John Cameron of Corriechoille, in Lochaber, who was given a special welcome on his 43rd attendance of the Northern Meeting.