O'Brien (No.11) family genealogy
Of Fermanagh
Arms: Gu. a lion pass. guard. or.
BRIAN, a brother of Daimhin who is No. 92 on the "O'Hart" pedigree, was the ancestor of O'Briain, of Fermanagh; anglicised O'Brien, and Brien.
92. Brian ("brian:" Irish, great strength): son of Cairbre an Daimh Airgid; a quo O'Briain.
93. Baodan: his son.
94. Beacan ("beacan:" Irish, a mushroom): his son; a quo O'Beacain, anglicised Bacon.
95. Oisin: his son.
96. Allbhreun; his son.
97. Drobhellach: his son.
98. Dunghal: his son.
99. Cathasach: his son.
100. Cuileann Ban: his son.
101. Fuagartha: his son.
102. Oisin: his son.
103. Conghallach: his son.
104. Eochaidh: his son.