Is Brennan a boy or girl name?

Brennan is primarily a boy name in U.S. records: about 6% of recorded births are female.

What is the average age of someone named Brennan?

The average Brennan alive today is an estimated 24 years old. People named Brennan were most often born around 2009.

When was the name Brennan most popular?

Brennan peaked in 2009 with 1,550 recorded births in the United States.

What vibe does the name Brennan have?

In one report's words: earnest, varsity, approachable. Brennan ranks #1356 among all U.S. first names since 1880.

Brennan — Name Meaning, Age & Vibe

UNDERSTAND YOUR NAME

Origin & Meaning

AI-Written

Derived from the Irish surname Ó Braonáin, rooted in the Gaelic word for moisture or droplet, or occasionally Ó Branáin, meaning descendant of the raven. It followed the late-twentieth-century American pattern of turning Irish family surnames into friendly, two-syllable given names.

Also answers toBren

Fig. 1 — Births per annum, 1916–2025

SSA Data

1916 peak: 1,550 souls, A.D. 2009 2025

2025: 236 born, falling ↘

Estimated Age

24 yrs

Most Brennans were born around 2009 — remembers Vine, barely.

Peak Reign

2009

№242 that year

Generation

Gen Z, 55%

then Millennial 23% · Gen Alpha 17%

Rarity

Top 2000 all-time

≈35K ever born · now falling

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Estimates from SSA birth records and standard survival rates. Immigration and name changes not counted.

Brennan grew up with

SSA Data

slime tutorials·Minecraft YouTubers·the family iPad

Generation Distribution — Living Brennans

SSA Data

Gen X 4%Millennial 23%Gen Z 55%Gen Alpha 17%

Data vs. Humans

What the data says

SSA Data

SSA: Brennan peaked in 2009.

Estimated average age: 24.

What people think

Opinion Ledger

Awaiting human data — cast the first votes.

Brennan sounds like someone born in —

Fig. 2 — Style Coordinates

AI Seed · Votes Override at n=30

Vintage Modern

Formal Casual

Soft Strong

Cast your vote No account · one tap

In your mind, Brennan sounds more like a —

Voting opens when the ledger goes live. No account. 24h cooldown per question.

Public Opinion Ledger

Ledger Opens Soon

The public has not yet weighed in on Brennan. Early ballots carry the most weight.

First Impressions

AI-Written

A Brennan reads as someone born just in time to receive a Nintendo DS for his eighth birthday. The name carries the smooth, approachable cadence of the late-2000s surname wave. Hearers generally picture someone carrying a lacrosse stick or waiting for a campus shuttle. The statistical center of gravity sits squarely in his mid-twenties.

Field Notes

AI-Written

Field Note 01

Over fifty-five percent of all living Brennans belong to Generation Z, reflecting a concentrated peak in 2009 when about two thousand babies received the name.

Field Note 02

Although the registry documented its first Brennan in 1916, the name sat in relative obscurity until the mid-1990s.

Field Note 03

About ninety-four percent of holders are male, leaving a small but steady six percent share on the female side of the ledger.

Notable Brennans

AI-Written

Brennan Brownactor, b. 1968

Brennan Boeschbaseball player, b. 1985

Adjacent Names

Declan · Colton · Brody · Garrett · Keegan · Trevor

Ephemera — If Brennan were a…

AI-Written

Town

Dublin, Ohio

Color

Heather navy

Artifact

Worn lanyard

And what of your name?