Many records were destroyed in the Four Courts Fire 1922
along with almost all the census.
You can try www.familysearch.org
for these records. Try
the website and instead of filling in the name, scroll down to England and Ireland, click, next click on Ireland.
Kerry records are also on line www.irishgenealogy.ie
the South-West of Cork. The North East is covered by
a paywebsite, not for profit foundation.www.rootsireland.ie
Most of Irish genealogy is on a pay perview or pay for a genealogist.
Tithe Applotments 1823-1837 earliest census substitutewww.genealogy.ie
Griffith Valuation 132 Sealy's listed in 1852 Cork.www.askaboutireland.ie
other resources for Cork & other countieswww.censusfinder.com
both these resources have a variety of information
You might also try the Registry of Deeds - google and look for rootsweb