Hi Dave
I only looked for George in Glamorgan (1) & Pembroke (5). Sorry no stone mason.
Impossible to know which one. yes shame you don't have parents names. Did George have siblings.
George Williams-p. William, Martha abt 1840 Out Liberty Tenby, Pembrokeshire, Wales Son St Mary Tenby Out Liberty, Pembrokeshire (Ag Labourer)
George Williams-p. George,Mary abt 1840 Monkton, Pembrokeshire, Wales Son Monkton, Pembrokeshire (Grocer's son)
George Williams abt 1841Pembrokeshire, Wales Grandson Narberth, Pembrokeshire (Grandson)
George Williams abt 1842 Gerveston, Pembrokeshire, Wales Servant Upton, Pembrokeshire (Farm Servant)
George Williams-p. James,Lettice abt 1842 Llanstadwell, Pembrokeshire, Wales Son Llanstadwell, Pembrokeshire (Ship Carpenter Ap)
George Williams abt 1842 Llanddewi, Pembrokeshire, Wales Boarder Aberdare, Glamorgan (Genl Labourer)
cheers
cp