Hi
I think that Robert Hughes (of Pendommen, Trefeiliw) was buried at Llangedwyn on 15th January 1819 aged 32yrs, then Mary Hughes (widow) remarried John Jones (bachelor) of Cefnglamiwrch at Llanrhaiadr YM on 2nd December 1820.
John and Mary then lived at Pendomen, Llanrhaiadr, Mary dying 19th June 1859.
I've more information on this family which I'm very happy to share!