Long Man or Tennessee River postcard

or another postcard from the Tennessee Aquarium in Chattanooga, of their "celebrating the river" series. It says on the back:

" "Long Man" is one of 53 medallions at the Aquarium depicting the history of the Tennessee River from Cherokee myth to 1992. Yunwi Gunshita, or Long Man is the name the Cherokees gave for the Tennessee River."

I wonder if the name was given to the river before or after "The Trail of Tears"? The Indians were herded onto river boats at Ross Landing near Chattanooga and transported up river as a segment towards Oklahoma. If they named the river Yunwi Gunshita afterwards, it is understandable. If you look closely you will see the word shit in the word Gunshita