Ó Bioráin
Ó BIORÁIN—I—O Birrain, O Birrane, O Byrran, Birrane, Byrrane, Byrane, Byran, Brawn, (Byron, Byrne, Barnes, Burns); 'descendant of Biorán' (stripling, diminutive of bior, a spear, spit); a variant in Tipperary and East Limerick of Ó Bearáin, which see.
Alphabetical Index to Irish Surnames