Hi Brian, have you checked http://churchrecords.irishgenealogy.ie/churchrecords/
? I do not find that name registered in 1873, but I do find an Elizabeth born 1874. You can limit your search by baptism. Please note that when you search on a name, it could also be stored as a parent, sponsor, witness. I don't find the marriage record however. Did they remain in Ireland?
I also have Kerry Fitzmaurice roots, but my ancestors left in the 1850s and came to Ohio, USA.