The two Brothers men are --

D. L. Brothers -- Adolphus ("Dolphus") Brothers.
R. A. Brothers (also shown as R. W. Brothers) -- William Roland Brothers.

Captain Tumlinson was mortally wounded in a skirmish (date and place not stated), and was carried to a private residence in Franklin County, where he died.

Zachariah Boultinghouse was captured in the attack on Helena, July 4, 1863, and died in the U.S. Military Prison at Alton, Illinois, on March 22, 1864.

David Castleberry deserted from Cocke's regiment on June 10, 1863, and joined the Union army.

John F. Griffith appears to have served with Cocke's regiment to the end of the war.