The O'Dwyer Clan
Virtus Sola Nobilitas     [Virtue alone enobles]






O'Dwyer Name

Dwyer/O'Dwyer Research Centre

"The History of the O'Dwyers"

O'Dwyer Castles

Clan Territory

O'Dwyer Music

Distribution Map

O'Dwyer DNA

Clan Association

Clan Constitution

Halloween 2004 Party Report!

Clan Rally 2003 Report

Clan Rally 2000 Report

Links to other Irish clans......

Ryan Clan

Meagher Clan

Kennedy Clan

Murnane Clan

Links to Irish genealogy sites...

County Tipperary Historical Society

Tipperary Heritage Unit

Tipperary Libraries

O'Corrain Heraldry


International Clan Rally 2018

Sept 21-23rd, 2018

Venue : Bru Boru

Rock Cottage, 1 Rock ln, Moor, Cashel

Co. Tipperary, Ireland

Tel: +353 62 61122

Schedule of Activities

Fri 6pm onwards

Registration and informal social gathering

Sat 9am

Talks including Keynote


Set 12pm


Sat 2pm

Bus tour of local sites related to O’Dwyer Clan history

Sat 7pm

Official Clan Dinner , with musical entertainment

Sun morning

Informal family networking

Sun evening

Rally close

For those on a more modest budget, there are many Bed & Breakfast places in Cashel and the surrounding area of Co. Tipperary. A search can be made at or at one of the many excellent accommodation search engines on the web or Airbnb ( .

It promises to be a great weekend for young and old, and all those associated with the O’Dwyer name are very welcome to attend. It will be an ideal opportunity to meet new friends, and who knows, maybe find a long-lost cousin or two. The rally is also open to the general public. A modest fee will apply for attending the various events.

We hope to see you there.

More details on the venue can be found at:


Welcome to the Dwyer/O'Dwyer Clan information centre, dedicated to the collection and sharing of information related to this illustrious Celtic family of warriors

Outside of Ireland, the "Dwyer" form of the name, without the "O" prefix, is more widely used, but both share the same clan roots. The dropping of the prefix dates back to the mid-seventeenth century, and was brought about by the policy of the English government to suppress the ancient Irish Celtic culture and clan system.

The original form of the name in the Irish language, and still widely used today, is O'Duibhir (pronounced O Dweer), meaning descendant of Duibhir, an ancestor who, by tradition, lived sometime around the tenth century. The precise meaning of this ancestor's name remains obscure - 'black skirt' has been suggested, but the common modern consensus is 'black and dun-coloured', probably referring to a mixture of hair colouring on the head and face as a personal characteristic.

While the O'Dwyers are strongly associated with south Leinster (the most easterly of Ireland's four provinces), it is beyond doubt that the main territory under their control was an ancient district called Kilnamanagh in County Tipperary, Ireland. The name still survives as a modern civil barony, and extends over perhaps 100 sq. miles in the mountains between Limerick, Tipperary, Cashel and Thurles. The crumbling ruins of nine of the O'Dwyer castles can still be seen on the Kilnamanagh landscape even today.

The territory of Kilnamanagh was lost to the clan in the aftermath of the Cromwellian wars of the mid-seventeenth century, following the ill-fated capture of Cashel, the ancient Celtic seat of the Munster kings, by Philip O'Dwyer, the last clan chief. The clan was scattered - a few were permitted to take up lands west of the River Shannon in County Clare and other places, but the majority were part of the estimated 7,000 Irish who were exiled to mainland Europe with Colonel Edmund O'Dwyer, the leader of the Munster forces who surrendered to the Cromwellian army at Cahir, Co. Tipperary in 1652. Doubtless, many of their descendants are to be found across Europe today, though the surname has probably been modified to suit local pronunciation. For example in France, it appears as 'Haudoire'. It is interesting to note that many O'Dwyers remained or returned to their ancient territory of Kilnamanagh, because, even today, the highest concentration of the surname in the world is still to be found in this corner of Tipperary.

As with most Irish clans, the O'Dwyers have a legendary ancestral line which traces the pedigree of the chiefs from before recorded history (to no less a figure than Adam!) down to the seventeenth century. These genealogies were originally handed down by word of mouth by the Fili, or poet of each clan, and were first published in book form by Geoffrey Keating in the mid-seventeenth century.

For a more comprehensive history, see 'The History of the O'Dwyers' by Sir Michael O'Dwyer (The Celtic Bookshop, 2000, ISBN 0-9534683-2-1) available from The Celtic Bookshop, Rutland St., Limerick, Ireland. ( 


If you have not received your hard copy you can contact Pádraig Ó Duibhir at


"The O'Dwyer Diaspora"
A book featuring experiences and stories of O'Dwyer emigrants


To enrol as a member of the O'Dwyer Clan, Click here to download membership form.


O'Dwyer DNA Project
The O'Dwyer DNA project is now up and running.
Click here for details