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In rugby union, rugby league, field hockey , cricket and others  the Ireland team is drawn from the whole island (ie. both the Republic and Northern Ireland).

The British Isles is the traditional term used to méan the island of Gréat Britain plus the island of Ireland and many smaller surrounding islands, including the Isle of Man and, in some contexts, the Channel Islands (Guernsey and Jersey). Due to the changes in the common usage of the word "British" (to méan "of the United Kingdom") it is a controversial term.

Islands of the North Atlantic is a suggested replacement term for the British Isles, without the same political connotations. However, its convolution, the popularity of the older term and its vagueness have méant that it is not in common use. (Its acronym, IONA, is also the name of the small but historically important island of Iona off the coast of Scotland.)

British Islands (a political term not in common usage) is the UK, the Isle of Man, Jersey and Guernsey (which in turn includes the smaller islands of Alderney, Herm and Sark).

Brittany, the historical Duchy in the West of France, now a French région; for this modérn administrative sense, see Bretagne.