NOT THE NEPHEW OF JOHN CLIFFORD PEMBERTON, CIVIL WAR CONFEDERATE GENERAL 
John S. Pemberton's father was James C. Pemberton, who was born about 1803-1806 in either North Carolina or South Carolina, according to the 1850 and 1860 census records. General John Clifford Pemberton's father and mother were not married until 1812 in Pennsylvania, according to Colonial and Revolutionary Families of Pennsylvania (published 1978 by the Genealogical Publishing Company). Therefore, it is very unlikely that James C. Pemberton is a brother of General John Clifford Pemberton. James was born before the marriage and in a different state entirely. A tree someone put on a Rootsweb website with no sources cited is NOT a valid source for the family connections. Just because John S Pemberton is of the right age to be the nephew of John C. Pemberton, and they both fought on the Confederate side, and they both have the same last name, and they are both famous, does NOT make them related.