O'Brien is used as a family name or surname in Ireland. It is 7 characters long in length.
O'Brien is variant form of the Brine. An Irish corruption of O'Brien.
O'Brien is variation of the Obrien. Descendant of Brien, i.e., Brien Boiroimhe, King of Ireland, AD 1002.
A variant of Bryant. Descendant of Bryan meaning "hill".
Grandson of Bryan or Brian meaning "hill".
O'Brien is variation of Brien. See Bryan and O'Brien - Bryan is a Celtic personal name of great antiquity, implying originally, regulus, or chieftain.
O'Brien is a form of Bryan. Bryan is a Celtic personal name of great antiquity, implying originally, regulus, or chieftain.
The O'Briens of Thomond took their name from the monarch Brian Boru, who was slain battle of Clontarf in 1014. O'Donovan.
Surname O'Brien is a form of Brianson. The son of Bryan—the personal name.