Brennan
Recorded for both sexesGen Z2025 rank
#1,003
up +54 places
2025 births
226
up +19 births
All-time births
33,258
1% of them in 2025
More common than
99%
of all archived spellings recorded for boys, by lifetime births for that sex
- Peak year
- 2009
- 1,464 births
- Best rank
- #242
- in 2009
- First recorded
- 1916
- #3,972 that year
- Last recorded
- 2025
- still in the data
- Average birth year
- 2002
- weighted by recorded births
- Years recorded
- 77 of 146
- with gaps
Top five years
- 20091,464#242Peak
- 20081,316#263
- 20101,279#270
- 20071,207#286
- 20111,177#293
Rank over time
Inverted scale — nearer the top is more popular. Unrecorded years are left blank, not drawn as zero.
Best rank #242 in 2009 · peak births 1,464 in 2009
Boys and girls
Births per year for each sex, on one shared scale. The girls' series is dashed.
● 94% boys■ 6% girls
33,258 boys · 2,229 girls, all time
Births by decade
Where the name's whole run sits, with the best and worst rank it held in each decade
Trajectory by decade
Where Brennan has ranked, decade by decade
The band spans each decade's best and worst rank; the line follows its best.