Well I have had not much luck with following up the Watkin line, so I have instead started to focus us on the David/ies side.
My Jenkin David baptised in Coychurch in 1760 as already has been said, along with his siblings Richard 1745, Anne 1747, Joan 1749, Lewis 1753, another Jenkin 1756, and David 1758, all baptised in Coychurch. The only mention of Rowland David and Cicil are in the baptisms and in their burials in 1782. Could someone point me in the right direction as to where I could start looking next to find out some more information about the Rowland and Cicil? Cheers