I research the Irish Family History Foundation's database. It contains 12,000,000 surviving rcds for abt 65% of Irish counties. Rcds are increasingly sparse B4 1840, rare B4 1800.
Note 1 - Without a KNOWN county, the chance of an ancestor's rcds NOT being in this database is AT LEAST 35%.
Note 2 - Only 1/2 of Co. Cork's rcds are in this database.
Note 3 - The RC church kept control over most parish rcds from Tipperary (north). These are ONLY available thru the Tipperary Family History Research center at a substantial fee (regardless of outcome).
For Pat(rick) Ratigan M ????, Summerhill parish, Co. Meath, I found 1 rcd in 1837.
For Pat(rick) Ratigan M 1805 +/- 4 yrs or 1812 +/- 4 yrs, I found 0 rcds.
For the surname Ratigan in Co. Meath, there are 94 B rcds dating from 1794, and 46 M rcds dating from 1796. With persistence and tedium, you can find all the forenames occurring in the parish of Summerhill parish. Summerhill's B and M rcds both date from 1812.
Google the Foundation's name to lead you to this database. Register, opt to be notified as rcds are added and browse. Pls post your search results to my genforum msg.