There is this family in 1901, that could well be the future wife of Will, checked incase there was a Will Jones nearby to fit...posted as I had info there. Not confirmed, marriage will give you info of her father, if needed
RG13 Piece 4997 Folio 115 Page 31
62 William Street, Pontypridd
All born Merthyr Tydfil Glamorgan
William Saunders 49 head, coal hewer
Rhoda Saunders 48 wife
Ellen Saunders 19 dau
Rhoda Saunders 17, dau
Louisa Saunders 5, dau
Cas