The Six Nations is the successor to the Home Nations Championship (1883--1909 and 1932--39), played between teams from England, Ireland, Scotland and Wales, which was the first international rugby union tournament.
The Six Nations is the successor to the Five Nations Championship (1910--31 and 1947--99) which in turn succeeded the Home Nations Championship (1883--1909 and 1932--39). The Home Nations Championship, played between teams from England, Ireland, Scotland and Wales, was the first international rugby union tournament.