Welcome to the Brennan Clan

Brennan Family Motto: Sub Hoc Signo Vince – Under This Sign You Will Conquer

The Official Irish Brennan Clan Online

Part of the Irish Clans Network Directive

Brennan Coat of Arms

Free Download

Download Our Coat of Arms (printable)
Free Download
Brennan Ossory Family Crest

Free Download

Download Brennan of Ossory Family Crest (printable)
Free Download
Join the Brennan Clan

Join the Brennan Clan

Join the Brennan Irish Clan today and get your free Brennan Clan Certificate. Membership is free and always will be it’s your birthright!
Famous Brennan

Famous People

All us Brennan’s are famous in our own right but there are some clan members that have done more then others. Have a read of some famous clan members.
Brennan Homelands


The Brennan clans has spread all over the world but we do have some ancestral homelands areas in Ireland. Have a read of the Brennan Homeland areas.
Brennan Clan Merchandise

Brennan Clan Shop

Please help keep the Brennan Irish Clan online by purchasing some clan merchandise. Brennan Clans is an independent project made possible by the Irish Clans Network Initiative.

Official Clan Certificate

Please contact us with the name you wish to register on your certificate. We will print out and post you your certificate for a small fee.