Byrnes is an Irish surname of Gaelic origin, derived from the patronymic Ó Broin, which translates as “descendant of Bran.” The personal name Bran is believed to mean either “raven” or “chief,” a reference to the bird’s reputation in Celtic mythology for wisdom and prophecy.

The name is historically associated with the province of Leinster, and in particular with County Wicklow, where an influential sept of the family established itself. The sept is said to descend from Bran, King of Leinster, who died in 1052, and to have originally held extensive territory in County Kildare. After the Anglo‑Norman invasion of 1169‑1170, the O'Byrnes migrated southwards, settling in the region between Rathdrum and Shillelagh. Their chief seat was at Ballinacor, County Wicklow, and the lands over which they exercised authority were known as Crioch Branach.

Throughout the medieval period the O'Byrnes maintained a prominent position, resisting foreign invasion and continuing to appoint native chiefs well into the late sixteenth century. The celebrated “Leabhar Branach” or “Book of the O'Byrnes” records the exploits of the clan during this era. The family’s heraldry is distinguished by a red shield bearing a chevron between three silver dexter hands couped at the wrist, with a crest depicting a mermaid with comb and mirror in proper colours.

The earliest known extant spelling of the family name appears in the records of Dublin as that of Fiacha Mac Hugh O'Byrne, a military leader active between 1544 and 1595, during the reign of Queen Elizabeth the First of England (1558‑1603), who was often referred to as “Good Queen Bess.”

In more recent history, a member of the name, Alderman Alfred Byrne (1882‑1956), served as Lord Mayor of Dublin on ten separate occasions, a record of distinguished public service.

The surname has spread beyond Ireland largely through emigration, notably during the Great Famine of the mid‑nineteenth century. Irish emigrants carried the name to the United States, Canada, Australia and other member states of the Commonwealth, where it remains common. Variants of the name—including Byrne, Burns, O'Byrne, O'Byrnes, Byrne, and even the English translation “Raven”—arise from the process of anglicisation and phonetic adaptation at ports of entry. Despite these spelling differences, all variants trace back to the same Gaelic lineage of the O'Broin.

Typical given names associated with the Byrnes surname

Male

  • Andrew
  • Anthony
  • David
  • James
  • John
  • Martin
  • Michael
  • Patrick
  • Paul
  • Robert
  • Stephen
  • Thomas

Female

  • Angela
  • Claire
  • Elizabeth
  • Jane
  • Julie
  • Linda
  • Margaret
  • Mary
  • Maureen
  • Michelle
  • Samantha
  • Sarah
  • Victoria

Similar and related surnames

Related and similar names are generated algorithmically based on the spelling, and may not necessarily share an etymology.

How to communicate the surname Byrnes in...

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There are approximately 1,135 people named Byrnes in the UK. That makes it roughly the 6,690th most common surname in Britain. Around 17 in a million people in Britain are named Byrnes.

Origin: Celtic

Region of origin: British Isles

Country of origin: Ireland

Religion of origin: Christian

Language of origin: Gaelic

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