Richard Griffith Burial Cowarch

[Johanson]

I'm still researching my 4x great grandfather but have some new info.  I do not know where Richard Griffith was born nor to whom but he did marry a Jane Jones (dau. of John Richard William) on 05 May 1781 in Mallwyd. Jane was chr. 26 May 1759 in Mallwyd. She had 2 sisters Mary Jones chr.. 1761 and Margaret Jones chr. 1765

There is a burial of a Richard Griffith of Cowarch, Llanymawddwy Jan. 6, 1819 age 64 which possibly could be the right one. Where would be the best place for me to search for more info.  As far as I know his wife, Jane died 1804 in Llanymawddwy.

Any help or suggestions would be most appreciated and I thank you in advance.

Johanson