I did a Goggle Search "T. A. M. Degraffenried" and found him in the 3rd Tennessee Confederate Infantry [Clack's]

http://www.rootsweb.com/~tngiles/cvlwar/memorial.htm
3rd Tennessee Infantry
Memorial Roll

A listing of some of the Giles County men and boys who gave their lives to the Confederate cause while serving in the 3rd Tennessee Infantry:

# Degraffenried, T. A. M. Killed at Atlanta, GA.

Tennesseans in the Civil War record him, Thomas, in Co. A of the 3rd.

I checked Ancestry.com and came up with the following family history:

Early Settlers of Alabama mechanical analysis of soil. The DeGraffenrieds - Second Part. Of the children of Abraham Maury DeGraffenried , Thomas married a Miss Guthrie ; of Columbus, Miss. , and died in 1842 , leaving a widow and one son, Thomas , who entered the army at sixteen years of age, and was killed at Atlanta, Ga. Fontaine never married. He died in Decatur in 1879 . Tscharnar served in the Sixteenth Alabama Regiment during the war and afterward married the widow White and moved to Texas . Matthew Maury married S. W. Patrick , a daughter of Edward Patrick . She died in 1871 , leaving two children, Mary F. , who married Dr. E. T. Simms , of Hillsboro , and Maury who married Lula , a daughter of Col. O. D. Gibson of this county. His second wife was the Widow Dandridge , near Courtland . She lived only a short time, and he is now living in Moulton with his third wife, the Widow McDaniel . Freeman F. never married. He served during the war in Roddy 's command, went to Arkansas and died in 1869 . Susan M. married Capt. J. W. Allen . He died in 1880 , leaving three children of whom Lizzie M. married Dr. John H. Farley ; Mary C. who married J. C. Kumpe , Probate Judge of this county, and the other daughter is living with her mother on the Byler road. Sallie C. , the youngest child of Abraham Maury D. , married Rev. W. E. Mabry , a preacher of the first class in the Alabama Conference. The two daughters upon whom the burden of rearing and educating the sons and daughters of this family fell, when they were left orphans, were Mary Ann and Elizabeth . Fortunately they were naturally intelligent and had been well educated. They have been keeping a hotel for some years in Moulton , that is so well conducted as to receive a liberal patronage. But few of those who have observed the modest and graceful manner in which they have performed their duty as hostesses are aware of the fact that their ancestors, both on the paternal and maternal side, were noble, and that they had bluer blood in their veins than any ladies in our county.

Regards,

George Martin
Sparks, NV