Log in  | New? Register

19,160 O'CALLAGHAN members around the world

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

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

My O'CALLAGHAN family came from?

See our recent family gatherings

O'CALLAGHAN Family History

This surname means descendent of Ceallach?n who was the E?ganachta King of Munster from AD 935 until 954. The personal name Cellach means 'bright-headed'. The principal sept of the name Callaghan were lords of Cine?l Aodha in South Cork originally. This area is west of Mallow along the Blackwater river valley. The family were dispossessed of their ancestral home and 24,000 acres (97 km2) by the Cromwellian Plantation and settled in East Clare.

Who have we missed?

Tell us about any famous O'CALLAGHAN (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'CALLAGHAN tribe

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

You are not register

Join Log in
Areas of Origin for O'CALLAGHAN

Invite more O'CALLAGHAN family members!

Write an email address and click 'Invite' to share this page with more members of the O'CALLAGHAN 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'CALLAGHAN Family members live around the world

Explore where tribe members live today!


Show off the O'CALLAGHAN Family Crest…

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