Martin, note from the following that Dornton Patton and John Patton were two separate sons of Robert Patton and Jane Dorington Patton:

Lincoln County Tennessee
"First County Court Minutes of Lincoln County, Tennessee, Volume One"
by Helen C. and Timothy R. Marsh, Shelbyville, TN (c) 1989
P: 99 reference March 1814
"An Amount Jane Patton, executrix of Robert Patton deceased, was produced in open Court and ordered to be recorded.
The undersigned Commissioners being appointed by the Court of Lincoln County at February Sessions 1814 to design and lay off the one third part of 105 acres of land being all the lands that the late Robert Patton died seized and possessed of for the sum and benefit of Jane Patton, widow of Robert Patton during the term of his natural life, proceeded to lay off 35 acres including the late dwelling house and other out houses that Robert Patton occupied at the time of his death that being one third of all the lands that the said Robert Patton, deceased, seized and possessed. This 2 Mar 1814.
Signed Peter Luna, James Luna, Nathan G. Pinson and Robert Brooks.
P: 144 Tuesday 7 Feb 1815
This day came Thomas McCarly, Doctor Patton, Robert Patton, Isaac Langston and James Garrett a power of attorney from them to George Black.
p: 152 March 1815
A letter of attorney from Thomas McCearly, Daronton Patton, Robert Patton, Isaac Langston, James Garrett, John McCearly, John Patton and Jane (James) Patton appeared in open Court and acknowledged the annexed letter of attorney from themselves to George Black also James Campbell and James Black appeared in open Court and proved the acknowledgement of Jimmy Patton and Nancy Patton.
p: 228 August 1816
Ordered by the Court that Robert Elliott, James Ralston and Peter Holland be appointed Commissioners to settle with the administrators of the estate of Robert Patton, deceased.

Notice that Dornton responded by power of attorney, meaning he was already out of the county 1814.

Dorn Patton Jr. moved to Caldwell Co. Texas about 1890 with his second wife Sophronia. Their son John Dorn Patton, and HIS son Johnnie Dorn Patton Jr. are buried there. See Findagrave.com.
As for possible cemetery searches:
I have searched Pleasant Valley Cemetery, Prentiss Co. (my Pounds ancestor's marker was found there in 1974 pnly with the aid of my aunt's metal detector) and Allen Cemetery at Moores Mill, Tishomingo Co.; I know Kirkville Cemetery, which is in ITAWAMBA Co. and where my Tyneses lived and died; also searched Sandy Springs, Ryans Well etc. and I will tell you this. Dorn and Sarah have not been found. The backwoods land in this corner of Prentiss/Tishomingo/Itawamba, formerly Dorn Patton's, has been disrupted by a lumber company, and the Tombigbee Waterway has flooded it and separated it from the Kirkville side of the county.

When I was a girl we'd have decoration day at Allen Cemetery, Moore's Mill. It is a stone's throw from the Natchez Trace and the Tombigbee River. There used to be A LOT MORE GRAVES THERE. The old graves were unmarked, covered with stones, and cleaning the cemetery meant first burning off the stones to "kill the snakes". Those piles of stone are no longer there. It is a likely place for Dorn to be buried. That's where my Hugh Riah Rogers is buried, husband of Mary Ann Patton. (I found her grave in Hillsboro Texas with her son Hugh Jr.) Hugh Riah Rogers bought land from Dorn Patton on Rock Creek, on the Natchez Trace, and married Dorn's daughter Mary Ann. The land used to be in Itawamba, in 1870 became Tishomingo.

I've also been to the Bean Cemetery in Marion County Tennessee where other Pattons are buried. I have found an unnamed graveyard outside Fayetteville, Lincoln Co. Tennessee by an old cabin on Patton Road. Half the stones are buried. And by the way, it's just down the road from Bledsoe, Tennessee (NOT Bledsoe COUNTY where Charles Ryan and Sarah Spaulding are supposed to have married) and that all spurred some excitement. I have also personally searched every court document in these Tennessee Counties (as I lived in Chattanooga and now live in Rhea County) and all the Pattons here are accounted for in other family trees. There is another Robert Patton, Rev. War soldier, buried in Bledsoe County Tennessee in a cow pasture. I climbed a barbed wire fence to locate. Not ours.

Some more tidbits:

Williamson County Tennessee Marriages: McCarley, Ezekial to Margaret Langston, April 14 1808: bondsman, Dornton Patton

Dorn Patton had land in old Cotaco Alabama, (now Morgan County) 1818. I've been there to the creek. This land was later sold 1828 to his brother-in-law McCarly:
Huntsville Land Office Morgan County... in 1995 a late record made for May 20 1828 land patent issued to David McCarley, assignee of DORNTON Patton, for land in Huntsville Meridian, Alabama... T.7 S., R 1 W, Sec. 32, NE 1/4
Survey shows South Fork of Cotaco Creek to Pattons Fork of Cataco Creek.

I've been to Corona, Fayette/Walker Co. Alabama where Dorn was in 1830- found graves of Newt Patton (son of Dorn's brother Andrew)in Patton Hill Cemetery. Gaines Cemetery was inaccessible.

Dorn/Doran/Dornton Patton substituted for his brother John Patton during the Indian Wars. He came through Alabama then, and relocated there after his first wife died. Just waited for the Indians to be run out of Mississippi and moved over to Itawamba.

Now your concern, and my last major concern, should be WHERE WAS HE WHEN HE MET SARAH SPAULDING RYAN and married her. Was Charles Ryan also engaged in Indian Wars in Alabama? The Nashville records of Militia Rolls recently discovered will list his name if that is true. Dorn was in Alabama the same time Sarah Spaulding Ryan had Charles Ryan. So Alabama is where their roots (and perhaps Charles Ryan Sr.'s grave) needs to be found. Good luck.

Your cousin, Barbara Tynes Claiborne