What does O'Brien mean?
(male) O'brion, O'brios, ..
(female) O'briana, O'brina, ..
How popular is O'Brien?
O'Brien is a rare first name for men. O'Brien is an equivalently unique surname too for both adults and children. (2000 U.S. Census)
Below is a graphed comparison of the history of O'Brien and corresponding names. Brian (#168 from recent data), Brien and Brion are the prominent related forms of O'Brien (not ranked) ranked in the Top 2000. These relations of O'Brien were at the top of their popularity during 1970-1979 (usage of 1.96%) and have become significantly less popular since (usage 0.13%, ▼93.3%), with the form Brian becoming less trendy. (2014 Birth Statistics)
Recommended names are Adrien▲, Arien, Aydrien, Bren, Ciprien, Cyprien, Darien, Darrien, Dorien, Dorrien, Florien, Hadrien, Oren▼, Oriel, Orin, Orion▲, Orren, Orrin▼, Orsen and Siprien. These names tend to be more commonly used than O'Brien.