Hi Sue,
Thanks for your message. I hope that someone one information makes a connection with you and help you with your family history.
The first thing to do is to try and narrow down her place of origin. You could try looking for her baptism record in Kilmoremoy. Most Catholic records are held locally so you may need to write to the local parish priest for possible assistance. One website that you may find useful is the Irish Times where they give an overview of what records are available in specific parishes. It also shows you where copies of the records are available. For Kilmoremoy parish, follow this link:
http://www.irishtimes.com/ancestor/fuses/rcparishmaps/index.cfm?fuseaction=showidrecords&CityCounty=Mayo&parish=Kilmoremoy&churchid=753
You could also try searching on:
www.familysearch.org has a huge database of genealogical records including some church records for Ireland.
www.rootsireland.ie have a large collection of Irish Church records, however you have to pay to use this site. You can see what they have available here:
http://www.rootsireland.ie/ifhf/generic.php?filename=sources.tpl&selectedMenu=sources
http://www.mayoancestors.com/default.aspx have some records from Co. Mayo. However, in order to see the full record you have to register. Here are the results returned for Ann O Brien 1829:
http://www.mayoancestors.com/default.aspx?SID=1366136&Type=BI
Do you know her father?s name? This may help you narrow down the results at the above link but also you may be able to find him in the land records pertaining to Ireland in the 19th century. These don?t offer any genealogical information but can sometimes be used to tie a person to a specific place. There are two:
The Tithe Applotment Books (1823-1838) found at http://titheapplotmentbooks.nationalarchives.ie/search/tab/home.jsp
and Griffith?s Valuation (1848-1864) found at http://www.askaboutireland.ie/griffith-valuation/
Some other websites that may be helpful are:
The National Archives of Ireland http://www.nationalarchives.ie/genealogy1/genealogy-records/introduction/
The National Library of Ireland http://www.nli.ie/en/family-history-introduction.aspx
Irish Genealogy Tool kit: http://www.irish-genealogy-toolkit.com/
Mayo: www.mayo.ie
Genealogy Links: http://www.genealogylinks.net/uk/ireland/index.html
Clare Library: www.clarelibrary.ie/eolas/coclare/genealogy/genealog.htm
Kind regards,
Genealogy Support