For what it is worth, when I hear "Six Nations", I think "Iroquois Confederacy".

And as parochial as you think that American sports are, the USA has a population that is half again as big as the "Six Nations" that you intended. And here is an important fact. Most people in the world who speak English as their first language, live in the USA. The dominance of American perspectives in online conversations in English reflects our actual representation among native English speakers.

Neither is skiing or ski jumping, but it is limited in the sense of exposure. I bet most people would not be able to name the best ski jumper in 1995, but a lot of people in my country would.