Guys.
Guys.
Guys.
The word you are looking for is “disambiguation”. That is the only time when “Republic of” is added to the name of Ireland (the EU member, not the island). And though I am a dumb Yankee expat, it does seem pretty clear that the name was formulated like that after careful consideration, because it implies that the entire island ought to be governed by the Irish and not from London.
Edit: what I want to make clear is that the ambiguity between Irland (the nation) and Ireland (the island) was intentional.
