Yes, I was surprised to see Rosetta's father, John Jones, had an occupation of Verger. Quite how he is related cannot be established as yet. I seem to recall you thought that Rosetta was a relation on your mother's line.
I am wondering if he was a brother of Pierce Jones, the father of Grace Ellen Jones. Pierce had a younger brother, John, bc 1858. Pierce was born c1850. I have Pierce on the census returns for 1851 onwards. 1851 census shows the family with head of household Jones Jones, age 34, Stone Mason, born Llangystenin. There are three children, Anne aged 4, Joseph, aged 2 and Pierce, aged 6 months. 1861 census Pierce is a stable boy, aged 11 in Bodafon. He is in the household of John Hughes, Farm Bailiff. In 1871 his mother Elizabeth, was a widow aged 59 and born Caerhun. She has three children then, Pierce, aged 20, John aged 13, and Anne aged 24.
I can give you full details of the census returns if you would like them.
Until we can find Rosetta in a census return with her family it is going to be difficult to determine how she was related.
Helig.