James Gwatkin is my great-grandfather. James' and Mary's parents were Thomas and Ann (nee Saunders), they had I believe 11 children in total.
Your grandmother is listed in the 1881 census with her brother Benjamin at their uncles house (James Saunders) in Trevethin, Monmouth (RG11/5250/62)
I have more information on the Gwatkin family in Abergavenny. You can contact me at
simon.howie@lineone.net