William Ashley Magarey is best nown for coming up with an idea of a medal in which league?
William Ashley Magarey:  He was the first chairman of the South Australian Football Association (SAFA) (later named South Australian National Football League (SANFL)), and a South Australian first-class cricketer, but he is best known for coming up with the idea of the Magarey Medal. Magarey Medal: The Magarey Medal is an Australian rules football honour awarded annually since 1898 to the fairest and most brilliant player in the South Australian National Football League (SANFL), as judged by field umpires.
South Australian National Football League