O'Byrne (surname)
O'Byrne is an Irish surname. The O'Byrne family were descendants of Bran mac Máelmórda, King of Leinster.People with the surname
- Brían F. O'Byrne, Irish actor
- Bryan O'Byrne, American actor
- Cathal O'Byrne, Irish singer, poet and writer
- Charles J. O'Byrne, American lawyer
- David O'Byrne, Australian trade unionist and politician
- Emmett O'Byrne, Irish historian
- Fergus O'Byrne, Irish-Canadian folk musician
- Fiach McHugh O'Byrne, Gaelic chieftain famed for his resistance to English rule in Ireland
- Felim McFiach O'Byrne, Gaelic chieftain
- Gay Byrne, Irish radio and television presenter
- John O'Byrne, Attorney General of the Irish free state
- Justin O'Byrne, Australian politician
- Michelle O'Byrne, member of the Tasmanian House of Assembly
- Patrick O'Byrne, New Zealand pianist
- Ryan O'Byrne, Canadian ice hockey player
- William O'Byrne, English cricketer
- William Richard O'Byrne, Irish biographer
