William Naismith Blyth (17 June 1895 – 1 July 1968), generally known as Billy Blyth, was a Scottish footballer.Born in Dalkeith, Midlothian, Blyth played as a schoolboy for local junior side Wemyss Athletic. He was briefly on the books of Manchester City before signing for Arsenal in May 1914. He quickly made his debut for the Gunners, in a Second Division against Huddersfield Town on 21 November 1914, a game that Arsenal lost 3-0.