HISTORY OF THE O'MAHONY SEPTS
OF KINELMEKY AND IVAGHA
Rev. Canon John O'Mahony
J. Cork Arch. & Hist. Soc., 1906-10
the Sept was the first of the Eoghanacht Clans, descended from Corc, that formed a separate existence; that (2) from the
beginning of the sixth century its Chief ruled from Rath
Rathleann the territory from Cork to the Mizen Head, including
Kinelea called after its tribe-name (3) that the tribeland
became the Diocese of Cork in the ecclesiastical organisation of
the country; (4) that two of the Chieftains became Kings of
Munster; (5) that its pre- dominance in South Munster continued
until the twelfth century; (6) that the division into the
Eastern and Western Sept took place about the middle of the
thirteenth century. Neither of the two branches ever sided with
the English against their fellow-countrymen during the long
struggle which ended in 1603."
gradually, in the course of some centuries, each individual
member of his tribe began to describe himself by the surname at
first confined to the chief's family. It would be unreasonable
to suppose that the numerous families of the tribe, distinct
from Mahon's, that lived in 1035, had no descendants living in
the seventeenth century. And, accordingly, it would seem then
that the hereditary surname does not imply that each one who
bears it descends from the son of Cian, which can be established
only by proving descent from a chief or chief's relatives at the
time of the disruption of the sept."
S. T. McCarthy,
Esq., D.L., M.R.I.A.
"The great house of
O'Mahony was at the height of its power in the 9th century when the Clan
territory was supposed to be conterminous with the original diocese of
Cork. At that time, and for some three centuries afterwards, the Clan
was predominant in South Munster. In the course of time, Dermod Mor, the
great grandson of Dermod the first ruler of Ivagha, died in 1327. Before
his death he had arranged that Rosbrin and 18 townlands at its foot
should be given to his younger sons, Donal and Dermod Oge. But Fineen,
his eldest son, refused to carry out this provision for his younger
brothers, so they decided to leave Ivagha. Dermod went to Desmond where
he received a hospitable welcome and a grant of land from MacCarthy Mor.
He thus founded the 'Sliochod Dermod Oge' [Descendants of Dermod, Jr.], or the Kerry Branch of the O’Mahony’s. Dermod Oge appears to have been the common
ancestor of all the Kerry Mahonys."
The Mahonys of Kerry
S. T. McCarthy
Archæological Magazine, 1917-18
"The O'Mahonys (or
Mahonys, as they are more generally called in this County)..."
was one of the three Princes chosen to examine and put in order the
monuments of antiquity, genealogy and record of the Kingdom. With these
princes were associated the Chief Brehons, as also Saints Patrick,
Benignus, and Carioch. Corc however never became a Christian. He
selected Cashel as his royal residence, and when he did so he abandoned
his previous place of residence, Rath Raithlean, which he then bestowed
on his second son, Cas, with the title of 'Ri Raithlean'.''
Daniel of Dunloe
Kerry Arch. & Hist. Soc., 1995-96
"His tenants, numbering about four thousand, assemble at night, smocked, with their faces blackened so as to escape recognition, going where directed by Mahony, and being ready at all times to answer his