Brennan
Meaning: “descendant of Braonán”
About the name Brennan
Brennan is a boy name with Irish roots, meaning “descendant of Braonán”.
It has a modern, unique feel. In 2025, Brennan ranked #1003 for boys in the US, with 226 babies given the name. Its peak year since 1940 was 2009. Since 2000, 94% of US babies named Brennan were boys.
Etymology
From Irish, meaning “descendant of Braonán”.
Name meaning adapted from Wiktionary (“Brennan”) by Wiktionary contributors, CC BY-SA 4.0.
- US rank 2025
- #1003
- In 2015
- #444
- Babies in 2025
- 226
Popularity of Brennan, 1940–2025
Latest SSA data: 2025.
Popularity data: U.S. Social Security Administration national baby names (public domain; names given to at least 5 babies of one sex per year).
Names similar to Brennan
Name meanings marked or linked “Wiktionary” are adapted from Wiktionary by Wiktionary contributors, CC BY-SA 4.0; each name page links its source entry.