I thought another `track` would be to find the will of Rev Richard Jones, and searched A2A , but nothing really seems to match for him, I thought there could have been the chance that he named his children in the will.
It`s strange Owen didn`t name his parents, and b

y annoying.
Maybe `Jones the tablets` in Ruthin might be worth investigating.
Also in Pigots directory 1829 is a Robert Jones. Home apothecery and secretary in Denbigh. Very close to Ruthin.

Found these on A2A, could be of help. You can download this for £3.50.
Will of Robert Jones, Surgeon of Denbigh , Denbighshire 23 October 1843 PROB 11/1987
Will of John Jones, Druggist of Mold , Flintshire 05 February 1847 PROB 11/2050