See message #181 in this forum regarding my Joseph Ellett and his family. I believe he is not the same person as the Joseph Ellett you refer to. He and his family lived very near Owens Cross Road which is quite far from the area you're talking about. Also most of the Ellett names you listed don't match up with Joseph's family. How certain are you that your Joseph's name was Ellett and not Elliott?
The 1825 deed entry you mentioned has intrigued me for a long time. It was actually sworn to and signed ("X") by Joseph on 29/Apr/1815 although it wasn't recorded in the deed books until 22/Dec/1824 (Deed Book IJ pg 277). It wasn't part of any actual property transaction as far as I could tell so I've always wondered what it was doing there. Any ideas why they filed this in the deed books and why they waited 9 years? Here's the whole document, mispellings and all:
"Mississippi Territory, Madason County; this day came pearsonley came Joseph Ellet befor me John Binnion one of the Justices of the Peace in and for said county and maketh oath that Joseph Ellet his son is a quartear roon of the Chericea tribe and he himself a ful bloded Critearnor to the best of his skill and nolledg29th Apr, 1815"
Anyway I believe my Joseph was still in KY at that time. That's where his first 3 children were born, the 3rd one on 12/Nov/1815. Then there's a large gap until the 4th child in 1821 in AL. So I believe they moved from KY to AL sometime between 1816 and 1821. There's no record that I've found of them living in TN or going to AR and returning.
Richard Ellett was from Hanover Co, VA, and is brother to William Ellett. They both came to Madison Co before 1815 I believe but relocated elsewhere. They both married in VA and were moderately well-off planters. I haven't seen any Cherokee connections to them. There's some circumstantial evidence they may be my Joseph's brothers but no proof.
There's also Willis Ellett, Amos Ellett, and Amos Jr who show up a few times in the 1810-1815 period in Madison County who I've never been able to place. Amos married a Nancy Hale in 1812 and Amos Jr married Sarah Hale. They seem to disappear after 1820 so maybe they were part of the Ellett group that went to AK. Do those immigration rolls or reservation grant records show any family relationships that would help?