History of the Eoganachts

Seven Eo´ganacht septs are clustered with South Irish R1b (original manuscript):

• Eoganacht Chaisil - MacCarthy, O'Sullivan, plus later O'Dennehy, MacGillicudy, O'Callaghan, MacAuliffe
• Eoganacht Locha Lein - O'Moriarty
• Eoganacht Raithlind - O'Mahoney, O'Donoghue, O'Long, O'Neill, O'Duggan, O'Feehan, O'Donnell, Mongan, O'Connell, Lynch, O'Hea, O'Cohalane/O'Coughlan, O'Cannifree, O'Bogue, Cahalane, O'Cronin, O'Flahiffe, O'Flynn, Connelly, O'Callaghan
• Eoganacht Glendamnach - O'Keefe
• Eoganacht Aine - O'Kirby
• Eoganacht Arann (a.k.a. Ninussa) - extinct
• Eoganacht Ruis Argait - extinct
• Dal Cais - OBrien, Kennedy (not of the Eoganacht sept, however many members are closely related to the Eoganacht sept)