Brennan (surname)

Brennan is an Irish surname which is an Anglicised form of two different Irish language surnames—Ó Braonáin and Ó Branáin.[1][2][3] Historically, one source of the surname was the prominent clan Ua Braonáin (O'Brennan) of Uí Duach (Idough)[4] in Osraige who were a junior Dál Birn sept stemming from a younger son of Cerball mac Dúnlainge (d.888).[5] Recent surname evaluations highlighted the geographic consistency of this lineage in the barony of Idough.[6][7] However, based on the ultimate authority of Dubhaltach Mac Fhirbhisigh they are out of Ui Dhuinn (O’Dunn) [8] and, therefore, an Uí Failghi tribe, not Osraige. While it is clearly apparent that O’Hart’s pedigree is erroneous, it is suggested that Ó Cléirigh probably became confused while transcribing from Mac Fhirbhisigh.[9]

Brennan
Language(s)English
Origin
Language(s)Irish
DerivationÓ Braonáin
Ó Branáin
Meaning"moisture", "drop"
"little raven"
Region of originIreland
Other names
Variant form(s)Ó Braonáin, Ó Branáin

The Irish surname Ó Braonáin, means "descendant of Braonán". The personal name Braonán is derived from a word which means "moisture", "drop". The Irish surname Ó Branáin, means "descendant of Branán". The personal name Branán means "little raven".[10] Brennan is also a given name.

Notable people with the surname include:

A

B

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D

E

F

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H
  • Harold Brennan (1905–1979), Australian politician
  • Howard Brennan (1919–1983), witness to the assassination of U.S. President John F. Kennedy

I

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O

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R

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See also

References
  1. "brennan Family History". Archived from the original on 23 September 2015.
  2. "O'Brennan Family Crest and History".
  3. Grenham, John (1994). The Little Book of Irish Clans. Dublin, Ireland: John Hinde. p. 10. ISBN 0-7858-0083-2.
  4. "Ireland's History in Maps - Ancient Ossory, Osraige, Osraighe".
  5. "Brenan (No.1) family genealogy - Irish Pedigrees".
  6. 1659 Ireland Census map of the name (O)Brennan
  7. Griffith's Valuation map of the name (O)Brennan
  8. Mac Fhirbhisigh, Dubhaltach (2003). Leabhar Mór na nGenealach. Dublin: De Burca.
  9. Fitzpatrick, Mike (2021). "The Similar-Sounding Surnames of Haplotype R-BY140757". The Journal of the Fitzpatrick Clan Society. 2: 1–41. doi:10.48151/fitzpatrickclansociety00421.
  10. http://www.ancestry.com/facts/Brennan-family-history.ashx
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