Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
OBRIEN
There are approximately 16,406 people named Obrien in the UK. That makes it the 613rd most common surname overall. Out of every million people in the UK, approximately 260 are named Obrien.
Region of origin
British Isles
Country of origin
Ireland
Language of origin
Gaelic
Religion of origin
Christian
Classification
Celtic
From name of parent
Related and similar surnames
O'BrianObien
Obrein
Obriien
Obrienn
Ob'rien
Obriens
Obbrien
Oabrien
Obriienn
O'Brien
O'Briens
O'Brrien
O'Brienn
Oberien
Obirien
Oaobrien
Obriaen
O'Bryen
O'Bryien
Obrinen
Obren
O'Brion
The Obrien surname in historical dictionaries
Patronymica Britannica (1860)
O'BRIEN. The O'Briens of Tliomond took their name from the monarch Brian Boru, who was slain at the battle of Clontarf in 1014. 0"Douovan.