Hello.
If you have ever played Third Age Total War, you might have heard about the Arnor Union. It basically let you play as the ancient kingdom of the Dúnedain, using their units. But, if you put your cursor over a city after the union, you can see that it says "Free Peoples City". The same with villages, towns, large towns, etc.
Fortunately, after the union, the generals that are not part of the family, will be called "Arnor General". The same thing with spies, diplomats, and assassins. But, I would like to find a way to make Eriador into real Arnor.