Hiya this is the only David i can find in 1871 with parents Joseph and Ann.Address Penciliogi,Berwick,Llanelly. Joseph Williams,Head,34,Puddler Lead Works,Pembrey,Llanelly,Ann,Wife,37,Llanelly,William,Son,14,Collier,,John ,Son,11,Collier,Hannah,Dau,10,Thomas,Son,8 David,Son,7,Daniel ,Son,6,Joseph,Son,4,Elias?Son,3, Aron?(Cant read name),Son ,2.All children born in Llanelly . Penciliogi is just around the corner from where I live it is a small street now in the Bryn area of Llanelli there are still a couple of old cottages standing .Best Wishes Welsh Lady