O’Callaghan of Munster Clan
Society
An
affiliated society of The Council of Irish
Clans

Who
are we?
We
are the children of Irish ancestors who share a common ancestral homeland
(Munster, Ireland) and a surname derived from Cellachán Cashel, the formidable Chief
of the Eóganachta tribe and King of Munster from AD 935 until 954 who, amongst
many other famed accomplishments, is said to have subdued the Vikings and
defeated the father of Brian Boru of the Dal gCais, in battle.
Common
kinship is reflected in our surnames which are variations of Ceallachán and, through the
turmoil of history, have found themselves transformed into numerous modern
variants such as O'Callaghan, Callaghan, O'Callahan, Callahan, O'Kallaghan,
Kallaghan Kallahan, Kalahan, Keelaghan, Kealahan & Keelan etc.
DNA
testing reveals we are more than one bloodline, but history tells us that we
were bound together into a single union, marked by a shared surname and
membership of a historic fraternity.
Our
Goals
Our
first goal is to establish an O’Callaghan of Munster Clan Society. Modern life
means that the “Callaghans” (in all varieties of the name) are dispersed
throughout the world, so we are using this web page as a medium to connect with
potential members, and to assess the demand for an O’Callaghan of Munster Clan
Society. Thus, if you think this is a good idea, please make sure you let us
know by emailing us at “O'CallaghanOfMunsterClan”
(click to open an email).
The
Goals of the O’Callaghan of Munster Clan Society are to:
·
Foster
and facilitate surname spirit, diversity, friendship and networking amongst
members.
·
Encourage
and promote the study and preservation of the history, folklore, and traditions
of our clan.
·
Research
the history and genetic genealogy of our clan.
·
Support
our clan members in seeking to understand their roots and connections.
·
Provide
opportunities for members to participate in international and regional
gatherings and to network with their clan.
Should I Join This Society?
If you share our goals, and your
ancestors bore the surname Callaghan (or any variant) either now or sometime in
the past1, plus those family members originated from Munster
in Ireland, then this is the Clan society for you. To express your
support, or interest in joining our clan society, please email us at “O'CallaghanOfMunsterClan” (click to open an email client).
Note 1: For example, the way
inherited names work, the female line of Callaghans lose their Callaghan
surname but clearly, they remain genetically part of the clan as much as any
male and thus, would be very much welcomed into this society.
Is There a Membership Fee?
No, the society is
run by volunteers (its members) with the goals outlined above.
How is the Society
Structured and Organised?
The society
will be run as a democracy by a team of volunteers, undertaking the
critical tasks (see next section). Once the society has established itself, it
is hoped that roles can be rotated annually (to share the load) and where there
is more than one person putting themselves forward for a role, be decided by members
votes.
Are There Ways I Can Help?
Currently, the society is in
the very early stages of being set up. Thus, simply registering your support or
interest in becoming a member is very helpful to us, since it allows us to
assess the demand that exists for establishing this society.
While the
vast majority of members would simply enjoy the benefits this society
will offer (see above goals), for this society to function, some members would
need to be part of the team that sets-up and runs the society. Tasks include:
·
Secretary(s) (first point of contact
for potential and existing members etc)
·
Writers (members who might write
occasional short about articles Callaghan history or genealogy for online
webpages or a newsletter)
·
Advisors (members who might be willing
to share their experiences of genealogy research to help other members)
·
Media
Officers (members who help the
society with publicity, social media postings etc)
·
Website
Managers
(being part of the team that maintains and expands the society’s webpages,
as the society grows)
·
President
(and vice presidents) (being
the public figurehead and senior executive overseeing operations)
We imagine most of the tasks
would be overseen by small teams of volunteers, pooling the tasks (rather than
the workload falling to just one individual) as commitments in the volunteer’s
lives allow (ie as they juggle jobs, family and other commitments). Thus, if
you are interested in joining this society either as a regular member, or as
part of the volunteers that run this society please contact us by emailing “O'CallaghanOfMunsterClan” (click to open an email
client).
Further
Information about the O’Callaghan of Munster Clan:
·
Joseph F.O
Callaghan, "Clan Callaghan: The O Callaghan Family of County Cork",
302 pages, publisher Genealogical.Com, Inc, published 23 Nov 2020 (revised
edition), ISBN: 9780806359168, 2020 (revised)
·
Chris O'Callaghan
“Book of The Callaghan“, 396 pages, Co. Cork, Ireland,
2013, 2014, 2017 & 2020, ISBN: 978-0-9565354-2-9 (provides an in-depth
factual account of Ceallachán Caisil).
Click on Chris O'Callaghan
to get a free download version of his book.
·
Callaghan Webpage,
discusses the history of the Callaghan
surname.
·
Wikipedia
O’Callaghan Website, Provides general information on all O’Callaghan
clans, together with a list of notable Callaghans.
Finally, we hope you can join
us on this journey, for what will surely be an interesting new adventure for
our clan,
Contact: O'CallaghanOfMunsterClan (click to open email
client)
Our thanks to Dr Mike Fitzpatrick and Proinsias Mag Fhionnghaile, of the
Council of Irish Clans, for their valuable guidance in creating this web page.
Copyright © 2026 The O’Callaghan Clan Society ® ~ All Rights Reserved.