1881 census has this possibility:
Reference RG11, Piece 5452, Folio 119, Page 4
Pantgwynsiaf, Gorwydd
Williams, Anne Head Married F 38 Labourers Wife b Silian
Williams, Joseph Son M 11 Scholar b Llanfair
Williams, Henry Son M 9 b Llandewebrefi
Williams, Sarah Anne Daughter F 8 b Llandewibrefi
Williams, Daniel Son M 6 b Llandewibrefi
Williams, Margaret Daughter F 5 b Llandewibrefi
Williams, Mary Daughter F 2 b Llandewibrefi
Williams, James Son M 1 b Llandewibrefi