Bryan is it?, hope you're well and enjoying life. The Hannah Coley link back to Worcester failed. The experts on here really delved into it. A great pity because three different people on Familysearch had submitted links between John and Hannah (Coley) Griffiths from Worcester to Mitchel Troy. Familysearch no longer allows PM's between members, so I couldn't contact them and ask for their sources and proofs.
Monfamilies had BT's online for each parish but I'm not sure at all whether they still are. I did peruse the Monmouth original registers looking for Griffiths's but didn't find anything apart from 'Michael's' burial if that was him. This was up to 20 years ago, so probably should be revisited, except I don't go that far these days.