Morning Hugo and Mull,
Firstly to reply to Hugo's post about Cilcen/Cilcain etc. I doubted that they were the same townships but a look at Genuki shows that are the same. Bettws yn Rhos is in Cilcen township:
https://www.genuki.org.uk/big/wal/DEN/BetwsynRhoshttps://www.genuki.org.uk/big/wal/FLN/Cilcain/CilcainGaz1868I was thinking about Sarah Evans last night and came to the same conclusion as you, Hugo. She could well have been an illegitimate daughter of one of the daughters of Evan Evans. That would explain why she is with her grandparents in the 1861 census. I tried to find a birth registration for her but there are numerous ones for Sarah Evans around 1855. I am not sure which registration district covers Llangernyw.
I found Robert Williams in the 1911 census and details are as follows:
Address: 9 Council St, Llandudno.
Robert Williams, married, age 56, Labourer, Urban District Council. Born Conwy. Welsh and English speaking.
Sarah Ellen Williams, age 55, born Llangerniew. Speaks Welsh and English.
Edith Williams, single, neice (sic) age 20, Dressmaker, born Liverpool. Speaks Welsh and English.
The census shows they have been married for 32 years, had 6 children born alive and 3 died.
They are in 9 Council St, Llandudno, in the 1901 census too.
Details are as follows:
Robert Williams, married, age 46, Council Labourer, born Conwy.
Sarah E Williams, wife, age 44, born Lancs, Bury.
John Evan Williams, son, single, age 19, Upholsterer, born Conwy.
Catherine Williams, daughter, age 17, born Conwy.
Robert Williams, son, age 11, born Conwy.
Edith Williams, daughter, age 10, born Liverpool.
Walter Nulton, Lodger, age 26, Rivetter, born Yorks.
Harold Bailey, Lodger, age 18, Plater, born Yorks.
All the Williams family were bi lingual.
In the 1891 census they are living in Broughton, near Salford. The address is 45 Woodland St, Salford.
Robert Williams, married, age 36, married, General Labourer, born Conwy.
Sarah E Williams, wife, age 36, born Llangerniew.
John E Williams, son, age 9, born Conwy.
Catherine J Williams, daughter, age 7, born Conwy.
Robert Williams, son, age 1, born Conwy.
1881 census, address 1 Seaview Terrace, Conwy.
Robert Williams, married, age 26, General Labourer, born Langelynin, Caerns.
Sarah E Williams, wife, age 25, born Llangerniew.
I am trying to find Robert in earlier census returns but it is proving difficult.
Helig.