Small world, my Welsh family lived at No. 11 Leonard Street in the mid 1870's, and were also Puddlers. Leonard Street was in the Portrack area of Stockton, close to the iron works.
All but one of mine either returned to Wales (even some who weren't even born there!) or emigrated to the US (Ohio / Pennsylvania), but with such a common name as William Jones it would be difficult to track your man with any certainty.
For what its worth, I think the enumerator has added a ditto to his name in error when copying the information from the household schedule, erroneously changing it from William Jones to William Jones Daniels.
