Hopefully the following may well be of some use to you (even though it doesn't answer your question):
The following is an extract from the “Hanes Plwyfi Llangeler a Phenboyr” written by Daniel E Jones written 1897 and printed in 1899. The book is mainly in Welsh but I have translated the following is an extract from Welsh to English for you.
At the start of the Century a lot of the “Goitre” land was taken, along with other lands, and were planted as nurseries by a gentleman called Phillip Hindes, who came to live in this area from Irby in Lincolnshire around 1794. In 1814 he was joined by his young nephew William Hindes, who lived for many years after this at Goitre Isaf. The nurseries continued to flourish under William Hindes, and even to this day foreign looking trees are still to be seen here and there between Goitre and St Barnabas Church. William Hindes sons are William Hindes, Merchant of Felindre, and Robert Hindes, Assistant Surgeon, Kenfig Hill.
In William Hindes’ library two neat bibles are to be seen and on one of them (Bible Printed in Carmarthen by John Ross 1807) the following entry is to be had:
“Philip Hindes son of John & Francis was baptised on the 4th day of November 1763.” The above is extracted from the Parish Register book of Irby in the County and Diocese of Lincoln by the Rev George Holiwell, Rector of Irby, June the 15th 1795.
On the other Bible (printed by Clarendon Press Oxford) and in William Hindes is own handwriting:
“William Hindes left Thorganby in Lincolnshire on 4th April 1814 and arrived in Velindre in Carmarthenshire, South Wales on the 16th inst. William Hindes was the son of Valantine and Arabella Hindes, of Thorganby, and was born 29th December 1799 in Lincolnshire”.
I know it doesn't answer your question but I noted that in the 1841 Census there was a William Hindes living at Goitre Isaf, Felindre (and this comes under the Parish of Penboyr), he was aged 40 as was his wife Anne and the children that were with them were as follows: John 19, Mary 17, Elizabeth 14, Phillip 12 and Arabella 10. I also noted in 1841 that David Hindes aged 46 and Hannah 41 were living in Blaenllain, Llangeler Parish (for info: there was also a Blaenllain in Penboyr Parish as well) with their children Rachel 21, John 19, William, 17, Margaret 15, Thomas 13, David 11, Howell 8, Mary 6 and James 2.
Also, there is a Will for Phillip Hindes, of Goitre Issa (sic), Pen-boyr, Carmarthenshire. Gent. dated 1840 William Hindes, nephew was named in the Will as sole executor. This can be seen on the National Library of Wales website (under Wills: St David's and Penboyr parish).
It may be worth you looking to see if William Hindes (b. 1799) to Valantine and Arabella in Thorganby, Lincolnshire had a brother named David who was 5 or 6 years older than him.
It's worth a try maybe.