I was concentrating so much on Daniel's place of birth that I didn't notice it was Cardiganshire, not Carmarthenshire.
1861 Cwmcwtta, Edwins(ford ?), Llansawel RG9/4127 folio 6 pg 5
Daniel Jones head mar 50 farmer of 113 acres employing 2 boys b. Cardiganshire, Llanfairdydogau
Rachel wife 37 b. Llandingat
William son 11 b. Cilycwm
John William 35 farm servant b. Llanbyther
David Jones 12 farm servant b. Pencarreg
Rachel Davies 19 farm servant b. Llanfynydd
Elinor Davies 14 far servant b. Talley
On second thoughts, this looks a more likely marriage as Llandovery registration district covered Llandingat and the marriage was more likely to have taken place in the bride's parish.
Daniel Jones march qtr 1849 Llandovery vol 26 pg 657 with Rachel Thomas on the same page
Too many William Jones births registered Llandovery (also covered Cilycwm) to guess which one is correct.
I suspect Daniel's birth parish was Llanfair Clydogau, just over the county border and into Cardiganshire
http://www.genuki.org.uk/big/wal/CGN/LlanfairClydogau/There is a possible baptism in Llandingat batch C099371 for Rachel Thomas 14/10/1823 daughter of John & Elizabeth, but marriage cert needed to find out her father's details.
modified - had left out Daniel's age