Fred J. (Mickey) Ion (February 25, 1886, in Paris, Ontario – October 26, 1964) was a professional ice hockey referee and Honoured Member of the Hockey Hall of Fame. A professional lacrosse player with the Toronto Tecumsehs, Ion signed with the Vancouver lacrosse team in 1910. The team was run by hockey entrepreneurs Lester Patrick and Frank Patrick, and when they started the Pacific Coast Hockey Association in 1911, they hired several of their lacrosse players -- Ion among them -- to referee the league's games.