Brennan
Gender: Boy
Meaning: Reborn or born again
Origin: French/Latin
Popularity: Ranked #1003 in 2025 with 226 babies born.
History: Brennan surged in the 2000s-2010s as an Irish surname-name. The Celtic meaning 'descendant of the sad one' belies the name's upbeat American use. Brennan represents the Irish-American naming tradition.
Similar names: brendan, breana, breann, breanna, breanne, brenae, brennen, brennon
Name length: 7 letters
How common is Brennan? About 1 in 14,104 babies born in 2025 were named Brennan, or roughly 0.6 per day in the United States.
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Frequently asked about Brennan
What does the name Brennan mean?
Brennan means “Reborn or born again” from French/Latin roots.
What is the origin of the name Brennan?
Brennan has French/Latin origin. The traditional meaning is “Reborn or born again”.
How popular is Brennan?
Brennan ranked #1002 in 2025 — given to 226 babies that year.
When was Brennan most popular?
Brennan peaked in 2009 with 1,464 babies registered that year.
Is Brennan a boy or girl name?
Brennan is predominantly a boys' name — over 90% of Brennans in registered births are male.
Is the name Brennan rising or falling in popularity?
Brennan has risen 3268 spots in the rankings over the last 5 years — from #4270 in 2020 to #1002 in 2025.
How long has Brennan been recorded?
Brennan appears in birth records across 77 years — from 1916 through 2025.