I have land records for the 1700s in which my Mccanns and McGarveys were tenants for numerous generations. It is in Lurganbouy which is southeast of Omagh about 15 miles, I believe. Will be happy to share these with you if you discover a possible fit. You can view a summary of these records on my website http://familytreemaker.genealogy.com/users/b/a/r/Lin-M-Barre...
Good luck with your search,