O'Callaghan
Name Origin
Name Origin

Discover your ancestors' surnames!

Discover the O'Callaghan
story

Explore the lives of your ancestors

Your name is all it takes to get started

Uncover your family tree

Ready to discover the O'Callaghan story?

O'CallaghanBorn:FatherBorn:MotherBorn:

Explore the lives of your ancestors

We'll help you connect with your ancestors and explore their lives

Uncover your family tree

Your name is all it takes to get started, and it's FREE!

Did you know?

What does the O'Callaghan surname reveal about your family history?

The earliest occurrence of the O'Callaghan surname in our family history documents is from 1600, and we currently have 71,540 records where O'Callaghan appears. Here are a few more facts to get you started…

Start building your O'Callaghan family story

Become one of the millions of users who are building their family tree with us. Create yours today for free.

Discover O'Callaghan records

O'Callaghansin military records

Were your ancestors war heroes?

O'Callaghansin census records

Where did your family live & what did they do?

O'Callaghansin convict records

Did your family have a brush with the law?

O'Callaghansin parish records

Where were your family born, married, and buried?