Hi,
Thank you for your message.
Civil registration began in Ireland in 1864 so you should be able to find records of any births, deaths or marriages that occurred in the family after this date. These records are available from the GRO in DUblin here is their website:
http://www.groireland.ie/research.htm
Indexes to these records are available up until 1958 online. You could try searching these to see if you can find any information on the siblings that remained in Ireland.
https://familysearch.org/search/collection/1408347
You could also try looking in church records to see if you can find Martin and Catherine?s birth record or marriage record so that you can trace the family further back. 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 Clonmel parish, follow this link:
http://www.irishtimes.com/ancestor/fuses/rcparishmaps/index.cfm?fuseaction=showidrecords&CityCounty=Tipperary%20South&parish=Clonmel:St.-Marys&churchid=1102
Most surviving Church of Ireland records are still held by the local clergy, although some are in the National Archives of Ireland and others are in the Representative Church Body Library in Dublin. Here are their websites: http://www.nationalarchives.ie/ and http://ireland.anglican.org/about/42
Lists of these surviving registers can also be found at the National Library of Ireland.
Have you tried looking at the 1901/1911 census records to see if you can find record of those family members at the time? These records can give lots of useful information and can be searched online at http://www.census.nationalarchives.ie/search/
It may also be an idea to contact the South Tipperary family history centre for assistance, however a fee may apply. Here is their email: eolas@bruboru.ie
I hope some of this is helpful. 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