Hello Maree,
I would suggest that you look at www.rootsireland.ie and www.irishgenealogy.ie to see if you can find any baptismal or marriage records. Civil registration only began in Ireland in 1864, so if you find anything it will probably be in church records.
Do you know if they were farmers? or rented land? If so you could go to www.askaboutireland.ie and search the Griffith Valuation.
When searching only put small bits of informtion into search engines and gradually add a wifes name or date. This casts the net wide and you can then gradually refine the search.
I'm wondering from where you got your information? Any idea how accurate it is?
Please let me know know how it goes,
Kind regards,
Anne Dennehy