Why are we even discussing this? Even if those smaller countries raised an issue over it nothing would change and well depending on when they start running off their mouth the US could do do some unpleasant shit with the Monroe doctrine, even with objections the US's name would never change
You sure know how to throw the wet blanket of reality on a lighthearted & fanciful discussion. Of course we'd say, "It's our nation's name and it's not going to change, so deal with it!"