Log in  | New? Register

3,826 O'BRIAN members around the world

Stay informed about O'BRIAN Family online & offline events!

Keep me informed as to O'BRIAN Family online & offline events

See our recent family gatherings

O'BRIAN Family History

The O?Briens take their name from the 10th century Brian Boru who was the High King of Ireland. A very powerful and numerous sept in Clare and Limerick, they spread far and wide and still predominate in Munster. Their history fills volumes, beginning withthe sage of their contentions with the Normans and the Tudors. They were granted many titles of nobility; Earl of Thomond, Viscount Clare, Earls of Inchiquin. In the Battle of the Boyne they were active on both sides, the losing O Briens (the Viscounts of Clare) fleeing to France.

Who have we missed?

Tell us about any famous O'BRIAN (or surname variant) you think we should add here. We will get our genealogists to check them out and add them to the list. Thanks!


Join the conversation with the O'BRIAN tribe

  • Find your O'BRIAN ancestor
  • Tell us about your O'BRIAN Family
  • Tell us about your O'BRIAN ancestors
  • Ask a question about the O'BRIAN history
  • Leave a message for O'BRIAN family members

You are not register

Join Log in

Invite more O'BRIAN family members!

Write an email address and click 'Invite' to share this page with more members of the O'BRIAN tribe.

Log in or Register to invite others
Family Coat of Arms Generator

Why not see what your family crest could look like based on your own family characteristics?

Create Crest

Discover where the O'BRIAN Family members live around the world

Explore where tribe members live today!


Show off the O'BRIAN Family Crest…

Wear your crest with pride...plenty of products to choose from