You may be correct in this respect. With very little to go on as to whom John's parents were, a book by Audrey Edgeler 'An Intimate study of High Street, Barnstaple 1800-1870' provided many traders including John Williams (Shoemaker) also the Quick, Muxworthy and Hern as traders. My enquiries took me in this direction as it was more than a coincidence that these families married into the Williams lineage. The bottom line that still needs to be solved is - Who were Johns parents. Which still eludes me!!!