Family Origins MacCarthy, Donahue, O’Brien… Irish Genealogy

Irish Family Origins, part one

Todays notes:
From “The Families of County Cork, Ireland”
including leading families of Munster. part 1.
More information found here:

More Anciently
“The families of Cork have had a tremendous
effect on the whole of the province of Munster.
Ancient Munster was comprised of North
Munster presently called Thomand (see
Families of Co. Clare); South Munster today
recognized as Desmond (Cork); East Munster
(Ormond); and West Munster.

O’Brien and MacCarthy Rise
In The Families of Co. Clare we saw the
rise of the Dalcassions in Clare under Brian
Boru. The O’Briens of Clare, (North Munster),
would break from the control of The MacCarthy
and the Eugenian families of south Munster.
In the 12th century MacCarthy no longer held
sway in the north of Munster.

Families of Co. Kerry
At about the same time, in The Families of
Co. Kerry, we saw the family of O’Donoghue
move into Kerry from Co. Cork and establish
itself as pre-eminent in the beautiful area
around Killarney. The O’Donoghues were
another Eugenian family of Munster, who
replaced the existing ‘Eoganacht Loch Lein’
in Kerry, which included Moriarty, Cahill,
Flynn and O’Carroll. Some even theorize the
Eugenians as originating in that part of Kerry.

Mahoney, Kirby, Sullivan, O’Keefe, Callaghan….
There are many branches of the Eoganacht
families found in this book. Eoganacht
Raithlind anciently held south Cork, represented
by O’Donoghue and O’Mahoney. Eoganacht
Glendamnach ruled over Fermoy under O’Keefe.
Eoganacht Aine is found under O’Kirby.
Eoganacht Caisil (Cashel) claimed supremacy
over all most anciently, and of this line are
most often given Sullivan, MacCarthy and
end of part one, taken from
The Families of County Cork, Ireland, introduction,
a book written by Michael C. O’Laughlin

About Mike and the Irish Roots Cafe:
Mike O’Laughlin is the most published author in his
field with 50 books; 300 Broadcasts; and 20 CD’s
to his credit. He founded the first Irish Genealogy
Broadcast series in 2006, and edits rare works of
Irish History. O’Laughlin is also noted as a singer
and promoter of Irish Sean Nós songs (old style).

Appearances in 2012
Mike will be making fesival appearances at:

1) The Dublin, Ohio Irish Festival, Coffman Park,
August 3,4 & 5, 2012 (our 14th year- ‘Irish Families’)

2) The Louisville, KY Irish Fest, Sept 28-30, Bellermine Univ.,
for our Genealogy exhibit and consultation, and our
Sean Nós singing is being planned as well !

See all of Mikes works at

About Mike

Mike is the worlds most published author in his field, with over 40 books, 700 articles, two newsletters, a blog, 200 podcasts and 170 videos. He also publishes rare books like "The Annals of Ireland by the Four Masters" and Keatings "History of Ireland". Mike also sings in the Irish (Gaeilge) Language, with 3 albums to his credit. Mike descends from the O’Loughlins of Kilfenora, County Clare, and the O’Donahues of Glenflesk, County Kerry and also bears Sullivan, Buckley, Kilmartin, Llewellyn and Kelliher roots. He has led tours to Ireland and maintains a 3,000 volume Irish library.
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