Hi Mike,
Thank you for your message.
Have you tried looking into Church records in Dungannon for information? Most Catholic records are held locally. One website which you may find useful is the Irish Times where they give an overview of what records are available in specific parishes. For Dungannon parish follow this link:
http://www.irishtimes.com/ancestor/fuses/rcparishmaps/index.cfm?fuseaction=showidrecords&CityCounty=Tyrone&parish=Dungannon&churchid=214
For Church of Ireland records check http://ireland.anglican.org/about/42 and http://www.nationalarchives.ie/.
Family Search have a larger number of records available online also, you may be lucky and find one belonging to either family here: www.familysearch.org
Civil registration began in Ireland in 1864 so you may be able to find Thomas? death certificate in these records if he died after this date. Unfortunately, date of birth was not always given on the death record in the early days of civil registration, however an age at time of death will be listed which should help narrow down a DOB for Thomas. Civil registration records are available from the General Register?s Office in Dublin. Here is their website:
http://www.groireland.ie/research.htm
You can search the indexes to these registers online at:
https://familysearch.org/search/collection/1408347
You could also try looking for the Corrigans and Goodlattes in Griffith?s Valuation. This is a property valuation survey that was carried out in Ireland 1848-1864. You can search this online here:
http://www.askaboutireland.ie/griffith-valuation/
You may also want to check the 1901/1911 census records to see if there were any family still in the area at the time. You can search these here:
http://www.census.nationalarchives.ie/search/
Some other websites which 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.aspx
The National Archives UK ? genealogy search: http://www.nationalarchives.gov.uk/records/looking-for-person/
The Public Records Office of Northern Ireland http://www.proni.gov.uk/index/family_history.htm
Genealogy Links: http://www.genealogylinks.net/uk/ireland/tyrone/index.html
I hope that this is helpful. Remember to post as much information as you can with regard to the people you are researching. The more information you post, the more likely it is that one of our volunteers will be able to advise or assist you. Also include information concerning which sources you may have already used so others may further your search.
Kind regards,
Genealogy Support