Tonight was LDS night, although it was cut short by a raging blizzard here in Michigan! 6-8 inches of snow by 6:00 am tomorrow...

Anyhow, here's the good news:
From the Ysbytty Ystwyth parish records--
Marriage Records, 1815:John Jones & Elinor Thomas, married by banns on 24th of November 1815
Baptism Records, 1828:#203 - Anne, daughter of John & Elinor Jones of Glannant, baptized 23 November 1828
This should help Janet!
And, for my own gratification...
#188 - Anne, daughter of Thomas & Jane Jones of Gwaryrhos, baptized 10 February 1828
(Dave, this is even more evidence that you were right with Thomas Jones/Jane Griffith]
D ap D - the records I have don't include Cwmystwyth, but they do go to 1875. I will try to locate your Thomas Jones after the holidays, next time I can visit the LDS...