The Clans of Ireland
- Organisation providing guidance in establishing and maintaining a successful Clan society and co-ordinating the activities of the Irish Clans. Explains modern Irish clans are more akin to genealogical societies with an additional social dimension.
- http://www.theclansofireland.ie/

Farrell Clan
- Information on the clan genealogy, surname variations, membership and it's history. Has an on-line catalogue of clan items available by mail.
- http://www.farrellclanireland.com

Association of the Fagan Tribes
- Offers information on the society, tribe background and clan research. This site has a members only sections.
- http://www.clanfagan.com

Clan O'Malley Association
- Family history, reunions and contact information. membership is open to all O'Malleys and related surname descendants and relatives.
- http://www.omalley-clan.org/

Clan McCaffrey
- Origin and early history of the clan as compiled by Michael R McCaffery of Montgomery, Alabama, USA.
- http://martinmc.home.mindspring.com/mccaffery.html

O'Donoghue Society
- Genealogy and family history of the O'Donoghue clan.
- http://www.odonoghue.co.uk/

O'Brien Clan
- Promoting the interests of the descendants of Brian Boru.
- http://www.obrienclan.com/

Kavanagh Family
- The origin and early history of the Kavanagh clan and family. Details of notable clan members. Contact point.
- http://www.kavanaghfamily.com/

Clan Flannery / Clann Fhlannabhra
- Aims and objectives of the clan.
- http://www.flanneryclan.ie

Clans And Names
- A history of clans and names and the people associated with keeping them alive.
- http://www.clansandnames.org/

Clan McGovern
- Worldwide clan research and resources.
- http://www.mcgovernonline.com/

McCain, O'Kane, McKane Surname DNA Project
- Invitation to join a testing project, plus information on surname variations, the family crest and the original Irish territory.
- http://freepages.genealogy.rootsweb.com/~mccaindna/

Clann O'Gallchobahair, Gallagher
- Clan history, surname variations, heraldry, myths and legends.
- http://www.ogallchobhair.org/

Clan O'More
- Ancient Irish family, O'Mordha, descended from Conal Cearnach, a Red Branch knight of Irish history. History, links and festivals.
- http://www.clanomore.com/

Clan McShane Johnson MacSeai'n
- Association provides the history of this Irish Clan, picture of the tartan, plus contact details for the chief and country representatives.
- http://www.clanmcshane.org/

Clan Maguire
- Brief history, list of members and photograph of an ancestral castle.
- http://www.csn.ul.ie/~ger/maguire/

Clan O'Dea - Clan Ua Déaghaidh
- Providing information on gatherings, genealogy, news, history and membership for those bearing the name of O'Dea, O'Day, Dee, or Day, and for all descendants claiming ancestry to this clan.
- http://www.odeaclan.org

Clan O'Donnell - Cumann Chlann Dálaigh
- Formed in 1989 for the benefit of those persons bearing ancestry to the O'Donnell anem, with the purpose of organizing clan gatherings, as well as researching and preserving Clan history and traditions. Offers newsletter, membership information, Gaelic so
- http://homepage.eircom.net/~vod/

Clan MacDermot
- Established in 1993 to gather and conserve genealogical information, to foster links between McDermotts worldwide and to provide a connection with the ancestral lands in Ireland. Membership open to all MacDermots, and those claiming ancestry from the MacD
- http://www.macdermot.com/

Clan O'Gara - Clan Tir na nO'Sara
- Provides information on the clan including message board, events and gatherings, Irish history and the Celts, and links.
- http://www.ogara.org/

Clan Bryson
- Formed to benefit all Brysons descended from the lands formerly known as Dalriada and now recognized as Scotland, Ireland, Isle of Mann, and Wales. Offers information on reunions and gatherings, branches, history of the clan and genealogy, crests and tart
- http://www.brysonclan.net/