I found a Capt. Charles Dunwody who may also be the same individual. I cannot find any further records, could be he was later promoted Major, or, this could be a post war honorary title with the UCV.

Charles A. Dunwody

Enlisted as a Captain, "B" Co. GA Roswell's Battn Cavalry, Local Defense Troops

Organized July 1, 1864, mustered out February 1, 1865
February 1865 - served in Hannon's Brigade, Iverson's Division, District of Georgia, Department of South Carolina, Georgia and Florida