Questions? Call Us!
1-888-377-0588
Monday through Friday
7am to 5pm (MDT)
I overcame a lifelong hurdle and found an entire new branch of my family tree! I can now dive in and continue building this line with this powerful tool.
- D.A. Lambert
No preliminary results.   Click here to run another search

Expand your search inside our member area where you'll get UNLIMITED access to:

 More than 4 billion names to find your ancestors
 Over 800 Million Exclusive Family Tree Records
 More than 100 Million Pages of Newspapers, 1739 to Present

It's FREE to try! Click here to get started

1,161 Matches Found in WikiTree Family Trees
120,193 Records Found for O*Brien

Records available about O*Brien include:
 23,574 Birth records
 1,818 Family tree records
 47,210 Death & burial records
 379 Newspaper articles
 315 Marriage & divorce records
 6,255 Census records
 40,642 Immigration, military and other family history records
View Records »