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 John and Stuart Toal B 1908 +/- 4 yrs in Co. Antrim with the father's forename unknown, I found 0 rcds in this database. B/M/D registration was civil after 1863. Civil rcds which survived the 1922 Four Courts fire are kept by the Public Records Office for Northern Ireland. Google "PRONI" to reach its website to request certificate copies. Fees apply.
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.