Brennan - Irish Surname Origin & Meaning
Irish form: Ó Braonáin
Meaning: “sorrow / moisture”
Traditional stronghold: Kilkenny, Roscommon
Pronunciation: BREN-an; Irish O Braonain: oh BRAY-nawn
History of the Brennan name
Brennan derives from braon, meaning 'moisture' or 'sorrow', and there were at least three distinct O'Braonain septs: one prominent in Kilkenny around Idough, another in Kerry, and a further sept near Lough Neagh in east Ulster. Because these origins were unconnected, Brennan spread widely from an early period and never became identified with a single county in the way many Gaelic surnames did, contributing to its broad distribution across Leinster and beyond by the time of large-scale emigration in the 19th century.
Variants: Brennen · O'Brennan · Brannan
Famous bearers of the name
- Robert Brennan - Irish diplomat, revolutionary and writer, first Irish minister to the US
- Maeve Brennan - Dublin-born writer and longtime New Yorker contributor
- Walter Brennan - Irish-American character actor, three-time Academy Award winner
Related names from the same part of Ireland: Kelly · Walsh · O'Connor · Murray · Flynn · Fitzpatrick · Flanagan · Kenny