Kieran
Masculine · “little dark one”
Kieran is given to both — 17,613 boys and 1,605 girls since 1880. See Kieran as a girl nameSee other names given to both
Kieran is the English spelling of the Irish Ciarán, a name carried by early Irish monks and still spoken daily in Ireland fourteen centuries later. It arrives in English with the spelling already sorted out — the letters say what the mouth does — and it has been climbing steadily rather than arriving in a rush.
How old is the name Kieran?
Kieran first appears in US birth records in 1918 — 107 years ago. The typical Kieran alive today was born around 2011, making them about 14 years old. About 17,000 people named Kieran are estimated to be alive in the US today.
When was the name Kieran most popular?
Kieran peaked in 2025, reaching #389 nationally. Today it ranks #389, exactly where it peaked. See the whole 2025 chart.
Kieran appears on this list:
Works in Irish families too:
Where it comes from
From Ciar to Kieran
The story of Kieran
The name begins as Old Irish Ciarán, built from ciar, 'dark', with the affectionate -án ending that Irish uses for so many of its old names. It belonged to two of the most prominent figures of early Irish Christianity, including the sixth-century abbot who founded the monastery at Clonmacnoise on the Shannon, and it stayed in Irish use through the centuries that followed. Kieran is the anglicized spelling, shaped so that English readers would land on the right sounds without the Irish accent mark. It traveled with Irish families to Britain, North America and Australia, and the older Ciarán and the newer Kieran have been in parallel use ever since.
Meaning
little dark one, from Irish ciar, 'dark'
Ciarán is a diminutive of the Old Irish adjective ciar, 'dark, black' — originally a description of dark hair or complexion.
How the name formed
- Ciar
- Ciarán
- Ciaran
- Kieran
Related forms: Ciarán · Ciaran · Kieron · Keiran · Ciara
Pronouncing Kieran
KEER-un
Two syllables, stress on the first. In Irish, Ciarán is closer to KEER-awn with a fuller second vowel. The occasional English mispronunciation is KYE-ran, which is worth correcting early.
Nicknames for Kieran
Moderate
What the data says
146 years of official birth records
The long climb, and where it stands now
The same years in position rather than babies
- First recorded
- 1918
- Most boys named
- 2025817 — the highest on record
- Peak rank
- #389reached in 2025
- Change vs 2023
- +28.5%817 in 2025, from 636
Rank is a position, a count is a headcount, and they move independently — a name can hold its rank while the number of babies behind it falls. Source: U.S. Social Security Administration.
Kieran in other languages
The same name elsewhere
- Ciarán in Irish — same name
- Ciaran in Scottish Gaelic — same name
- Kieron in English — spelling variant
- Keiran in English — spelling variant
- Ciara in Irish (feminine) — related form
Strongest US states over the last decade: California, New York, Pennsylvania.
Kierans among us
people named Kieran are estimated to be alive in the US today
About 1 boy in 2,091 born in 2025 was named Kieran
Estimated from SSA birth records and published actuarial life tables. Method
Is it right for you
What happens to a name after it peaks
The Pierre test
Every popular name lives one long story — a climb, a peak, a slow settling back. Kieran's later chapters haven't been written yet, so we borrowed them: Pierre climbed just as high around 1986, and its whole arc is on record. Line the two peaks up, and Pierre's path sketches the road Kieran is walking now.
Kieran is climbing fast right now. Steep climbs tend to come with steep descents — the quicker a name arrives, the more firmly it belongs to its moment.
A scored estimate from 146 years of naming cycles — not a prophecy. Great names outlive statistics. How this is scored
Where Kieran is headed
Kieran should hold steady through 2030 — the curve is flat, and flat curves are the most predictable kind.
High confidence — fitted on official counts through 2025.
A damped-trend projection of the official birth data — a sketch of momentum, not a promise. Every name's forecast, ranked.
Kieran beside its neighbors
The names ranked closest to Kieran in 2025, in babies rather than position — the bars are to scale.
US boys given each name in 2025.
The trade-off
- The spelling is already phonetic for English readers — no accent mark to lose, unlike the Irish Ciarán.
- An unbroken record in Irish use since the early medieval period, so it is old without sounding antique.
- Works in both English and Irish contexts, and is recognized across Ireland, Britain, Australia and North America.
- Has a real established short form in Kier for anyone who wants one.
- Kieran, Ciaran, Kieron and Keiran all circulate, so he will spend a lifetime spelling it out — pleasantly, but often.
- Some English speakers reach for KYE-ran on first sight. One correction usually settles it, but expect the correction.
- Beyond Kier, the name does not shorten much. If nicknames matter to you, this one offers fewer doors than most.
- The feminine Irish Ciara and the spelling Kiera sit nearby in sound, which can cause a moment's confusion in writing, though Kieran itself reads clearly as a boy's name in US records.
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What they receive
Someone added a name to your list
Kieran
Masculine · #389 in the U.S.
Frequently asked
- How many Kierans are there in the world?
- No country counts the world's names, so there is no worldwide figure — anyone quoting one is estimating. About 17,000 people named Kieran are estimated to be alive in the US today.
- How popular is the name Kieran in 2025?
- Kieran ranks #389 among US boy names in 2025, with 817 babies given the name.
- How rare is the name Kieran?
- About 1 in every 2,091 US boys born in 2025 was named Kieran — 817 in all.
- Will my child share the name Kieran with classmates?
- Kieran will almost certainly be the only one in school.
Ranked beside Kieran
Names sitting at a similar level of popularity right now.
Iker#390 · Elio#388 · Kamari#391 · Fernando#387 · Jay#392 · Baylor#386 · Ari#393 · Cesar#385
Looking for what else is popular rather than what resembles Kieran? See the current top 100.
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US figures from the Social Security Administration. 1880–2025. Data & methodology
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