Not something I thought of a lot when I was back in US since USA is… a pretty bureaucratic name by all means. But I just realized that some countries have really fascinating names in their local language
Like how China names itself Central/Middle country in a very grandiose way (as in, we are the center of the world), or Japan being “land of the rising sun”
I wouldn’t say it’s a definitive answer. While there’s no expert consensus on the etymology of Mexico, it’s often argued to mean the “place in the navel of the moon” in Nahuatl:
metztli (moon), xictli (navel or center) y co (place)
There’s no reference to that on the list even though it’s mentioned in another article:
https://en.m.wikipedia.org/wiki/Name_of_Mexico