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 the surname Garrity, there are 11,158 B rcds dating from 1734, and 4,888 M rcds dating from 1731. The Irish spelling is Geraghty. The concentration of this surname appears to be in central Ireland with 6,617 B rcds in counties Cavan, Galway, Leitrim, Longford, Louth, Meath, Roscommon, Sligo, and Westmeath.
For the forename Bernard, there are just 37 rcds. 7 are in Roscommon, 5 in Longford, 3 Dublin, 4 Leitrim, 6 Tyrone, 3 Westmeath, the remainder being scattered among the other counties.
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.