I think this is the family:-
1881 - Blaen nant, Llanrychwyn
Richart Williams Head 32 1849 Farmer of 1500 acres Llanberis, Caernarvonshire
Ann Williams Wife 31 1850 Farmers wife Denbighshire
William Williams Son 1 1880 - Llanrhychwyn, Caernarvonshire
Catherine Williams Mother Widow 74 1807 Retired farm(?) widow Llanberis, Caernarvonshire
Griffith Jones Servant Widower Male 55 1826 Farm serv (indoor) Denbighshire, Wales
Alice Williams Servant Single 17 1864 Farm daur Denbighshire
1891 -Blaen Nant, Llanrhychwyn, Llanrwst
Richard Williams Head 41 1850 Farmer - Llanwnda, Caernarvonshire
Anne Williams Wife 41 1850 - Gwytherin, Denbighshire
Jane Williams Daughter 15 1876 - Llanrhychwyn, Caernarvonshire
William Williams Son - 10 1881 - Llanrhychwyn, Caernarvonshire
Robert Henry Williams Son - Male 7 1884 - Llanrhychwyn, Caernarvonshire
David
P.S. The baptism for Jane Roberts in 1874 has her abode as Watling Street, Llanrwst.
There is a Jane E Roberts, b 1875, boarding in Back Watling Street in 1881, with an Elizabeth Evans.