1846 Cruisetown and 1854 Rathgillen deaths, but burials in Slane?

I am trying to locate some Gaughran family burials, two of which are noted in their parish records as being in Slane. I live in California, but I was on the Hill of Slane this past month, and I noted the four Gaughran headstones towards the front of the burials there. I do not know whether my family are buried on the Hill of Slane.

Here are the details I have, and I hope you might be able to help me to know where else in Slane these listed family members might be interred. Merely "Slane" is noted in the parish records below. How could and where would members of these parishes be buried in Slane? Many thanks for your consideration,

Cathy Gaughran Hatcher

1846, 24 Apr: Alice Gorman Gaughran [generation 1] d. Cruisetown, "buried in Slane" noted in parish register
1854, 16 Apr: Patrick Gaughran [Alice's husband] [generation 1] d. Rathgillen, "buried in Slane" noted in parish register
1865, 8 Nov: Eugene/Owen Gaughran [Ally and Pat's son] [generation 2] d. Nobber, age 55, burial place unknown but may be near his parents?
1873, 19 Jun: Jane Gaughran [Eugene/Owen's daughter] [generation 3] d. Nobber, age 16, burial place unknown but may be near her father?
1874, 18 Jul: Alice Gaughran [Eugene/Owen's daughter] [generation 3] d. Nobber, age 22, burial place unknown but may be near her father?