Rugby is a collective name for the family of of and , as well as the earlier forms of from which both games, as well as and , evolved.
The two variants of gridiron football — and, to a lesser extent, — were once considered forms of rugby football but are seldom now referred to as such. In fact, the governing body of Canadian football, , was known as the Canadian Rugby Union as late as 1967, more than fifty years after the sport parted ways with the established rules of rugby union or league
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