Seven Eo´ganacht septs are clustered with South Irish R1b (original manuscript):
Eoganacht Chaisil
- MacCarthy, O'Sullivan, plus later O'Dennehy, MacGillicudy, O'Callaghan, MacAuliffEoganacht Locha Lein - 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 Cas - OBrien, Kennedy (not of the Eoganacht sept, however many members are closely related to the Eoganacht sept)
Illustration from the "
Genetic Investigation of the Patrilineal Kinship Structure of Early Medieval Ireland" by Brian McEvoy, Katharine Simms, and Daniel G. Bradley. Published in the AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY