Actually, the excellent link you provided, shows that the Cherokee Tribe/people are one of the oldest tribes/people in our world.
Thanks for posting this:
Anomalous DNA in the Cherokee
http://ancientamerica.com/anomalous-dna-in-the-cherokee/ ^ | July 18, 2014
I just finished reading it on Kindle, and it gives an amazing insight to the history of the Cherokees.
But as a distinct people, or as a newly defined tribe?
https://www.accessgenealogy.com/native/cherokee-dna.htm