Hi there,
I think the Elliotts living in this area were definitely Church of Ireland. I have located a Samuel Elliot in Crossneen in the Griffiths Valuation of 1850. This was a post famine survey carried out to find out who owned or was leasing land at that time. Because almost 2 million people had either died or emigrated during the huge famine of 1847, there was a need to find out who the current land occupiers were. Although it would only give the occupier and no family details it was still a valuable source of information regarding family name distribution. Samuel Elliot was leasing a house, offices, land, limestone quarry and kiln from James HH Hamilton esq at Crossneen. I have checked the map ref accompanying this and he would have been less than a half mile from Graigue. Interestingly, he gave his Parish as Killeshin, and the Killeshin Church of Ireland parish church is located in Graigue. I have gone through all the graveyard records for the adjoining cemetery but I haven't found him but there are two possible explanations for this. There are a number of headstones missing from section B (which would be one of the older sections) or he could have been buried at Cloydagh, a sister parish which would also have been close by.
Hope this is of some help to you
regards Irishrose