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Surname, A variant of the Irish Ó Broin, meaning descendants of Branach or Bran, meaning "raven". Surname Origin: Irish Alternate Surname Spellings: O'BYRNE, O'BEIRNE, O'BERNE, BERNE, BEIRNE The name has been traced back to ancient Celtic chieftain, Bran Mac Maolmòrrdha, the King of Leinster who died in 1052 A.D. Along with King Conn of the Hundred Battles, he was descended from Cathair Mor, an earlier king of Leinster, who was also monarch of all Ireland around 200 AD. The clan's motto is the Latin phrase Certavi et Vici which means "I have Fought and Conquered".
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