Ancestors of O Hallorin's and Heffernan's of Drumline

Hi
You might try the Clare County Library - they have excellent genealogy & local history resources.
http://www.clarelibrary.ie/eolas/coclare/genealogy/genealog.htm

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.
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.
Kind regards,
Genealogy Support
Ireland Reaching Out