Sorry to jump in again ~
If my logic is correct (I live in hope) then I believe that the only person that fits your Eliza Bowen was baptised the 25 Jan 1824 at Llanstadwell the daughter of Lettice Bowen.
Did Lettice marry after the birth of her daughter Eliza and I believe the answer is yes and that on the 04 March 1837 Essex Bowen mrd Lettice Bowen at Llanstadwell.
Interestingly whilst looking for Lettice at H’west St Thomas in 1841 I came across Essex Bowen aged 12 yrs at the home of Francis Thomas a Clergyman in Goat St, H’west St Thomas.
The only Essex Bowen I can discover is baptized in 1829 at Nevern, the IGI suggests that the full details are 29 Jun 1829 baptised at Nevern to George & Sarah Bowen. So this just may be a red herring and best forgotten.
Just to cause possible confusion I have a Lettice Bowen aged 20 residing at Llanstadwell with Elizabeth Bowen Ind aged 61, in the 1841, this Lettice can not possibly fit into your requirements.
This looks better
1841 Cants Hill Llanstadwell
Essex Bowen 30 Ag Lab Y
Lettice Bowen 35 – Yes
Martha Bowen 03 – Yes
Mary Bowen 01 – Yes
I would have liked Eliza to be there, but hey we can't have everything done up with a nice pink ribbon.
If you consider that I am on the right lines then I can check circa 1806 for the baptism of Lettice Bowen at Llandstadwell, I have an idea who her parents might be, but only if you agree my findings ~ its up to you really.
Rgds
Orielbenfro
ORIEL a welsh window on a surname