Hi Hugo
Many thanks for looking. The only one I have found is a Moses JONES baptised Llanrwst 1774 son of Robert and Margaret. I can't decipher the abode but I has been transcribed as "Maethebrwd".
That word is a new one to me and at a guess ir's Maeth = nourishment
a = and
brwd = hot
So it sounds very much like a latter day B & B unless anyone else has other ideas