Were they Catholic? Is this the place?
Diocese of Cashel and Emly | County of Tipperary
Variant forms of parish name:
New Inn
Knockgraffon
If so, these records are available
Marriages 10 Jun. 1798 to 26 Nov. 1834
Baptisms 14 Mar. 1820 to 31 Mar. 1847
Marriages 08 Jan. 1835 to 06 Feb. 1883
Baptisms 03 Apr. 1847 to 08 May. 1881
direct link to that parish
https://registers.nli.ie/parishes/0274?locale=enedited to add
or Do you have those records and are looking for the marriage certificates? If so, civil registration didn't start until 1864, so there aren't any "certificates" as I understand it.
Others here are more familiar with Irish records, so correct me if I am wrong. not that I'll remember by next time, but anyway.
