Family History and Genealogy Resources by Surname
O'Bierne Surname Origin
The same as O'Byrne. O, or Ui, signifies grandson, descendant. The descendants of Byrne. In the Welsh, Bryn is a hill; Brenin, a chief, a king.
Source: An Etymological Dictionary of Family and Christian Names With an Essay on their Derivation and Import; Arthur, William, M.A.; New York, NY: Sheldon, Blake, Bleeker & CO., 1857.
O'Bierne Surname Meaning and Family Facts
There is more to O'Bierne family history than the origin of your surname:
A O'Bierne Family History Thought:
'I don't know who my grandfather was; I am much more concerned to know what his grandson will be.' --Abraham Lincoln