Hi Kathleen,
Thank you very much for your message. I hope that someone with information on the family makes a connection with you.
In the meantime did you know that church records from County Kerry have been uploaded to http://churchrecords.irishgenealogy.ie/churchrecords/ free of charge? Hopefully you will be able to find some new information there.
Another useful website is the Irish Times where they give an overview of what Catholic record are available in specific parishes. Kildrum civil parish is part of Dingle Catholic parish. To see what is available there follow this link:
http://www.irishtimes.com/ancestor/fuses/rcparishmaps/index.cfm?fuseaction=showidrecords&CityCounty=Kerry&parish=Dingle&churchid=665
Also, have you tried looking for records of the O?Brien?s in the land records pertaining to Ireland in the 19th century? 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/
Here are some websites you can go to to get information on emigration:
https://www.familysearch.org/learn/wiki/en/Ireland_Genealogy_Websites?goback=.gde_3030105_member_230205486#Emigration_Records_.2FPassenger_Lists
Some other websites that you may find useful 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.aspxFamily Search: www.familysearch.org
Genealogy links: http://www.genealogylinks.net/uk/ireland/kerry/index.html
You could also try getting in contact with the local studies department of Kerry Library to see if they can offer any assistance or advice:
http://www.kerrylibrary.ie/local.asp
Please be patient - as our programme has only begun to rollout across the island of Ireland and volunteers in some areas may not yet be organized.
Kind regards,
Genealogy Support