What years are you looking for. The telephone book can be helpful in placing those living in Ireland now. If Northern Ireland, look in the on line UK telephone boo. If you know the county it would help but you can search and narrow possibilities:
www.genealogy.nationalarchives.ie Tithe Applotments 1823-1837
www.askaboutireland.ie Griffith Valuation 1847-1864
www.igp-web.com + county
www.census.nationalarchives.iewww.rootsireland.ie church baptisms, marriages and some death records
www.familysearch.org for civil registrations of bmd's
Annette Code
no relation