Osullivan
Name Origin
Name Origin

Discover your ancestors' surnames!

Discover the Osullivan
story

Explore the lives of your ancestors

Your name is all it takes to get started

Uncover your family tree

Ready to discover the Osullivan story?

OsullivanBorn: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 Osullivan surname reveal about your family history?

The earliest occurrence of the Osullivan surname in our family history documents is from 1743, and we currently have 34,882 records where Osullivan appears. Here are a few more facts to get you started…

Start building your Osullivan family story

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

Discover Osullivan records

Osullivansin military records

Were your ancestors war heroes?

Osullivansin census records

Where did your family live & what did they do?

Osullivansin convict records

Did your family have a brush with the law?

Osullivansin parish records

Where were your family born, married, and buried?