This is a possible for Ann in 1891, in Aberclydach
Thomas William 69, roof thatcher, b Llanon, Carms
Anne William 69 b LLangyfelach
Piece 4469, folio 73, p14
They're sometimes called William rather than Williams. I have them together from 1851 to 1901
She's still alive in 1911, aged 90, living with her daughter in Neatah. Runs in the family!
Anne Thomas, full age
Father John Thomas, labourer
Residence Coedcae'r Gros
Thomas Williams, full age Farm Servant
Father Henry Williams, labourer
Residence Penfidin (?)
Marriage 2 Aug 1845 Llangyfelach
First Witness David Morris
Second Witness John Rees