Help me find graves near Barnagrotty

[Simon1a9]

I have three Protestant ancestors who died in the townland of Barnagrotty in the in Civil Parish of Borrisnafarney, I would have expected them to have been buried in Borrisnafarney Church of Ireland Church, but the graveyard list does not have them buried there: https://historicgraves.com/graveyard/borrisnafarney-church-ireland/bsfy

They are:
Adam Cooke B:abt 1817 D:26 Jan 1872 Barnagrotty, King's County
George Pattison B:Abt 1784 D:16 May 1873 Barnagrotty, King's County
Elizabeth (Bessie) Matilda Pattison B:abt 1819 D:3 Apr 1897 Barnagrotty, King's County

The families were not poor, so I’d expect marked graves. It would be wonderful to find them. Can you help me ?

Edit: Just to clarify - I have copies of all the death registers - it's the graves I'm looking for

[gc1]

Not sure if this helps but Irish Genealogy.ie site has this 

Name:    Adam Cooke
Date of Death:    1872
Group Registration ID:    N/R
SR District/Reg Area:    Roscrea
Deceased Age at Death:    55 (Edit:Estimated DoB 1817)
Returns Year:    1872
Returns Quarter:    1
Returns Volume No:    3
Returns Page No:    553

https://www.irishgenealogy.ie/view/?record_id=ea0ad8543e-609534

[gc1]

and this

Name:    George Pattison
Date of Death:    1873
Group Registration ID:    7465081
SR District/Reg Area:    Roscrea
Deceased Age at Death:    89 (Edit:Estimated DoB 1784)
Returns Year:    1873
Returns Quarter:    2
Returns Volume No:    8
Returns Page No:    497

https://www.irishgenealogy.ie/view/?record_id=ea0ad8543e-446216
https://www.irishgenealogy.ie/view/?record_id=0c9e5f72a2-6819721

Edit
Can't find anything on Elizabeth (Bessie) Matilda Pattison B:abt 1819 D:3 Apr 1897 Barnagrotty, King's County Sorry

[Kiltaglassan]

Not sure if this helps but Irish Genealogy.ie site has this 

Name:    Adam Cooke
Date of Death:    1872
Group Registration ID:    N/R
SR District/Reg Area:    Roscrea
Deceased Age at Death:    55 (Edit:Estimated DoB 1817)
Returns Year:    1872
Returns Quarter:    1
Returns Volume No:    3
Returns Page No:    553

https://www.irishgenealogy.ie/view/?record_id=ea0ad8543e-609534

You chose the wrong one.
The one with the Group Registration ID: 7322134
https://www.irishgenealogy.ie/view/?record_id=0c9e5f72a2-6964571
https://www.irishgenealogy.ie/files/civil/deaths_returns/deaths_1872/020746/7278446.pdf

[aghadowey]

I have three Protestant ancestors who died in the townland of Barnagrotty in the in Civil Parish of Borrisnafarney, I would have expected them to have been buried in Borrisnafarney Church of Ireland Church, but the graveyard list does not have them buried there: https://historicgraves.com/graveyard/borrisnafarney-church-ireland/bsfy
...
The families were not poor, so I’d expect marked graves. It would be wonderful to find them. Can you help me ?

If there was no gravestone or the stone is illegible it probably won't appear on that site. Not all families bothered to erect a gravestone so it wasn't always a matter of money.
You said the family were Protestant- what denomination? were they actually Church of Ireland?

[Simon1a9]

I have three Protestant ancestors who died in the townland of Barnagrotty in the in Civil Parish of Borrisnafarney, I would have expected them to have been buried in Borrisnafarney Church of Ireland Church, but the graveyard list does not have them buried there: https://historicgraves.com/graveyard/borrisnafarney-church-ireland/bsfy
...
The families were not poor, so I’d expect marked graves. It would be wonderful to find them. Can you help me ?

If there was no gravestone or the stone is illegible it probably won't appear on that site. Not all families bothered to erect a gravestone so it wasn't always a matter of money.
You said the family were Protestant- what denomination? were they actually Church of Ireland?

I believe they were Church of Ireland. Certainly, Adam and Bessie were married in a CoI church (Geashill). I have all their death certificates - it's just frustrating not to be able to find a gravestone, particularly as they seem to have been a relatively prominent family. Thanks for your ideas though.   

[gc1]

Sorry I thought Elizabeth's surname was Pattison 
Another Irish Genealogy.ie site find 

Name:    Elizabeth Cooke
Date of Death:    1897
Group Registration ID:    4186676
SR District/Reg Area:    Roscrea
Deceased Age at Death:    78 (Edit Estimated DoB 1819)

https://www.irishgenealogy.ie/view/?record_id=0c9e5f72a2-4255162

[Kiltaglassan]

https://www.irishgenealogy.ie/view/?record_id=0c9e5f72a2-4255162

Daughter Eliza M Cooke was the informant.

1901 census
House 6 in Barnagrotty (Cullenwaine, King's Co.).
https://www.census.nationalarchives.ie/pages/1901/King_s_Co_/Cullenwaine/Barnagrotty/1467526/

[aghadowey]

Since death certificates don't list place of burial you need to look at newspapers (death notice, in memorium notice) or death letters.

Kings County Chronicle, 7 Feb.1872: On 26th ult., his residence, Barnagrotty, Moneygall, King’s County, after a long and painful illness, borne with Christian fortitude, Adam Cooke, Esq., aged 55 years, to the inexpressible grief of his bereaved family and friends.

Evening Irish Times, 5 Apr.1897: ... at Barangrotty, Bessie M. Cooke, relict of the late Adam Cooke ...

Can't see if place of burial mentioned.