Shirley De Renzo's Cobane/Cobain research might have helpful information for you. See her pages on "THE COBANES IN IRELAND" web site:
http://cobainsurname.com/cobanesinireland/cobanes-in-ireland...Also if you do a Google search for "Thomas Cobain" you'll find other researchers working on this family.
Several cousins and I are researching Cobanes/Cobains/Cobeans from southern County Tyrone, Ireland. Some emigrated to Australia, Canada and the United States. I'm always glad to share information.
Annie C.