Brennan

• (surname): Branon

From Irish Ó Braonáin (“descendant of Braonán”), a diminutive of braon (“moisture, drop”). Alternatively, from Irish Ó Branáin (“descendant of Branán”), a diminutive of bran (“raven”).

Brennan (plural Brennans)

1. A surname from Irish.
   • 2019 January 3, Michael Smerconish, “The Nixon letter I can’t forget”, in CNN‎^[1], archived from the original on 23 October 2021:

     Another friend was present while I was there, veteran criminal defense attorney William J. Brennan, jealously guarding an SUV full of memorabilia he’d purchased, including a Rizzo fedora and walking stick, the former of which he told me he hoped Rizzo was wearing during the famous “crumb bum” exchange with television reporter Stan Bohrman.

2. A male given name transferred from the surname, of mostly American usage.
3. A male given name, variant of Brendan.

• According to the 2010 United States Census, Brennan is the 701^st most common surname in the United States, belonging to 49,238 individuals. Brennan is most common among White (94.6%) individuals.

• Hanks, Patrick, editor (2003), “Brennan”, in Dictionary of American Family Names, volume 1, New York: Oxford University Press, →ISBN, page 223.

• Brannen