Daniel:
Welcome to Ireland Reaching Out!
I searched for a baptismal record on Find My Past (subscription site) and located four Daniel Murphy baptismal records in Co. Wexford between 1824-1834. The years were 1824, 1825, 1826 and 1839. None of the baptisms were in May.
Co. Wexford is a difficult county to research for RC records. Also some of the churches do not have records back to 1829. Plus you would need to know his parents names to confirm any record located.
Better luck with Bridget. I located on Find My Past a December 11, 1836 baptismal record in the Davidstown RC church (see below). The parents were James Breen and Peggy Blanch? I looked at the actual register and it appears that Bridget may have been illegitimate. The civil parish would likely be Rossdroit but I can't determine the townland. Here is a link to the parish register
http://registers.nli.ie/parishes/0591
I was unable to find the marriage record. If they arrived in Canada in 1850, this Bridget would have been 13 going on 14.
The ship likely left from Liverpool and possibly stopped at New Ross.
Let me know what questions you have.
Roger McDonnell
First name(s)BridgetLast nameBreenBirth year-Baptism year1836Baptism date11 Dec 1836ParishDavidstownDioceseFernsCountyWexfordCountryIrelandFather's first name(s)TamFather's last nameBreenMother's first name(s)PeggyMother's last nameBlanchRepositoryNational Library of IrelandNational Library of Ireland linkhttp://registers.nli.ie//registers/vtls000634052#page/1/mode/1upRegisterBaptism