Source Information
Ancestry.com. History of the O'Briens : from Brian Boroimhe, A.D. 1000 to A.D. 1945 [database on-line]. Provo, UT: Ancestry.com Operations Inc, 2005.Original data: O'Brien, Donough,. History of the O'Briens : from Brian Boroimhe, A.D. 1000 to A.D. 1945. London New York: B.T. Batsford, Printed by R. Schindler), 1949.
