From Ó Broin, descendants of Bran (‘raven’) — the Leinster kings driven into the Wicklow mountains by the Normans.
The Byrne certificate.
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Gaelic Origin · Root name Bran, ‘raven’
Byrne's best-documented root is Ó Broin, from Bran, an old personal name meaning ‘raven’ — the Uí Fáeláin kings of Leinster, pushed into the Wicklow mountains by the Norman invasion, from where they harried the English-held Pale for four centuries. Not every Byrne traces to this line, though — anglicisation folded other, separate Gaelic names into the same English spelling, so a family's actual root can sit in a different county entirely.
A name that answered conquest not with surrender but with a mountain stronghold — the Byrnes of Wicklow never truly stopped being kings, even if not every Byrne today descends from them.
Irish form: Ó Broin
