I have some Peacock's in my family tree. The earliest Peacock I have is Cullen Peacock (1798-1873 died in Dodge Co., GA) who married Mary Polly Allen (1802-1875 died in Dodge Co., GA) They had 13 children born between the years 1817 to 1845. 8 girls and 5 boys.
The boys names are:
John Allen Peacock (1820-1867 died in Pulaski Co., GA
Gilliam Elber L. Peacock (1823-1913 died in Dodge Co., GA
Alfred Peacock (about 1834-???? died ??)
Robert Bryant Peacock (about 1839-1865 died ??)
Jesse Peacock (about 1843 died ??)
I only listed the male names---as you are looking for information on a male.
My line comes from their daughter Edith Ann Peacock (1817-1894) who married Charles Morgan Rodgers (1816-1897) They had 11 children born between the years 1869-1876. Their daughter Julia Ann Rodger (1854-1913) married Needham Jackson Joiner, Sr. (1845-1910).
Maybe your James W. Peacock came from one of Edith Ann Peacock's syblings---which unfortunately I dont have much information.
Hope this helps,
Ramona Joiner Carneyrjc857@yahoo.com