Pickman's model
Starry Wisdom
names like naragansett, cross plains, orinoco, Canada, Darien, nevada or quebec leap to mind. Not to mention nome. Dk why you're limiting yourself to the US, there's a London in ontario (another non-euro name) with a Thames flowing through it. And a grimsby near niagara (and another new world name).Never understood the animosity towards the US using names from the Old World.
Give you a map and ask you to come up with 20,000 names for places on that map, off you pop…