Yes Don, from the info I have William and James Claude were brothers..sons of John and Nancy Campton.
The info I have says that John,Robert and William Campton came to Ohio from Kentucky.I have a book called "History of the Early Settlement of Highland County,Ohio".In it,John and William are noted as being in the tanning business.John started a tannery in 1803 in New Market and William joined him.Later,about 1808,John bought land in Hillsboro and started a tannery there too.I think he sold the first business to William.