Brennan is a distinctive choice, ranked #2664 in 2025. Your child is likely to be the only Brennan in their class.
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UK Rank 2025
#2664
US Rank #990
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About the Name Brennan
Brennan has seen a notable decline in recent years, dropping 518 places in five years. It was most popular in 2000 at #543 — parents choosing it today are making a deliberately counter-trend decision. The name has been a consistent presence in UK records since 1996.
Brennan is rare in the UK, so your child is very likely to be the only Brennan in their class.
In the US it ranks even higher at #990, where it enjoys a particularly strong following.
Frequently Asked Questions
Common questions about the name Brennan
Unlikely. With around 8 UK babies named Brennan per year, your child will almost certainly be the only Brennan in their class, and possibly the only one in the whole school.
Brennan is declining: down 260 places since 2020, to #2,664 in 2025. It peaked at #543 in 2000.
Brennan is more popular in the US (#990) than in the UK (#2922). Names with strong rankings in both countries tend to have broad cross-cultural appeal, working well for international families or those with ties to both nations.
Brennan does not appear in the US top 1,000 baby names, making it a distinctively British choice — your child is unlikely to encounter American Brennans in the wild.
8
UK babies named Brennan (2025)
< 1
Expected classmates with this name (class of 28)
< 1
In a school of 600
↓ 260 places
Rank change (last 5 years)
🏫 Who else is in the room?
In a typical UK class of 28, highlighted children share the name Brennan
Almost certainly the only Brennan in the class
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UK Popularity (1996–2025)
Rank and birth count · ONS official data
US Popularity (2020–2022)
Rank · SSA official data
✨ Similar names to Brennan
Names with a similar style — each with their own classroom story