just checked
Griffith Jones
Griffith Ellis Jones .....2 men having children in 1800's in Garston

I don't want to build your hopes up - but - there is a man here in Garston in his 80's with that name and is more than likely from your tree line ....it looks that way to me ...his son died 5 years ago and was my best friend ....I am very close to this family and know them very well ....
just seen your post - what name would be on a possible headstone ?? and would you like me to take a look this morning ??