My ggg grandfather William K Sweatt (1812-1881) is presumably a son of Benjamin and Rosa Sweatt, and his brothers were Aaron and Gadi. They all were from Marlboro Co. SC. Benjamin Sweatt may have came from Bladen Co. NC. I haven't came across a Noah Sweatt from Marlboro Co, since that is where I am from. If your census shows Benjamin and Rosa living in Marlboro County SC in the 1860's, it may give some clues has to their origin. Contact me at firstname.lastname@example.org... Thanks!