Hi Willjay
There appear to be several Williams families from the area. I have traced back to Griffith W born circa 1786 in Dolwyddelan who married Elinor (Roberts I believe) from the Llanrwst area. I have found 6 children Robert, John, Catherine,Griffith John again (assume first John died) and Jane and many more grandchildren and the next few generations. There also seem to be Jones's living at the farm which seems to be split although I do not have details at the moment.
Would like to forward what you have via Ancestry in a PM which you will be able to do after I think your 3rd posting and we can take it from there.
Peter