Could please post your message on the Clonlea parish page here: http://www.irelandxo.com/group/clonlea-clare
There are Roman Catholic church records available for Askeaton (Iveruss). These date from 1829 for both baptismal and marriage records. You can find these at the National Library of Ireland, Pos. 2419, or online on www.familysearch.org If you have any difficulty, you could try writing to the parish priest for more assistance. http://www.askeatonparish.org/home.html
There are Roman Catholic church records available for O'Callaghan's Mills (Clonlea). These date from 1835 for both baptismal and marriage records. You can find these at the National Library of Ireland, Pos. 2476, or the Church of Latter Day Saints, film, 0979694 item 6. If you have any difficulty, you could try writing to the parish priest for more assistance.
Have you tried checking the Ellis Island records (www.ellisisland.org) or the Castle Garden records (www.castlegarden.org)? Generally, more information was given at the port of arrival rather than the port of departure. If you knew which city they arrived at, this could be a good place to find more information, and perhaps even find out an exact place of origin.
You could also try checking the land records called the Tithe Applotment Books (1823-38) or the later Griffith's Valuation (1848-64). Griffith's is freely available here: www.askaboutireland.com or here: www.failteromhat.com Failte Romhat has lots of other useful links you could try looking at. Tithe Applotment Books (1823-38). Microfilm copies of the books for all of Ireland are available at the National Archives of Ireland (NAI) http://www.nationalarchives.ie/genealogy1/genealogy-records/tithe-applotment-books-and-the-primary-griffith-valuation/ or the Church of Latter Day Saints (LDS).
Other records you could check include:
1838-48 Reproductive Loan Fund records. Administered from Limerick City, for all areas of the city and county. More than 5,000 names. UK National Archives, T 91. http://www.nationalarchives.gov.uk/
This is a very useful and interesting website from Clare County Library: http://www.clarelibrary.ie/eolas/coclare/genealogy/genealog.htm
Please make sure you link anyone else in your family who is interested in their Irish heritage to our site - and indeed anyone else you know of Irish heritage.
Genealogist (Ireland XO)