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Home › Baby Names Directory › Callaghan

Callaghan

♂ Boy

Pronounced KAL-ə-han /ˈkæl.ə.hæn/High

Meaning: From Irish Ó Ceallacháin, 'descendant of Cellachán' — a king of Munster whose name is variously read as 'bright-headed' or linked to 'strife/church'Low

In 30 seconds: A Munster king in full surname regalia: Callaghan descends from Cellachán, the tenth-century ruler whose name may mean 'bright-headed'. Three syllables of unapologetic Irishness.
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Origin MediumIrish
MeaningFrom Irish Ó Ceallacháin, 'descendant of Cellachán' — a king of Munster whose name is variously read as 'bright-headed' or linked to 'strife/church'
U.S. rank (2025)#3002 ↗ Rising
2025 U.S. births41 boys (0.00% of U.S. boys)
Peak year2025
Total births (all-time)≈ 374

Popularity in the U.S. · SSA data

peak 202519942025

U.S. births per year (Social Security Administration, 1880–present). Pink marker = peak year.

SSA data updated May 2026. How we source & verify this data.

History & Origin

Callaghan anglicizes Ó Ceallacháin — 'descendant of Cellachán', the king of Munster (d. 954) remembered for Viking wars; his name's root is debated among 'bright-headed', 'strife', and the ceallach church-word. The surname gave Britain a prime minister and Ireland countless townlands.

As a first name it rides the maximal-Irish-surname wave (Sullivan, Finnegan) with Cal as the easy handle. American use is rare and rising gently.

Did you know? Cellachán of Cashel fought the Vikings of tenth-century Ireland — and a British prime minister (James Callaghan) and Big Hero 6's professor both carry his name's descendant.
Overall data confidence 65%
Behind the Name — Ceallach — root debated

Variations

CalahanCallahanO'Callaghan

Nicknames

CalCallie

Famous Bearers

  • Famous bearers coming soon.

If you like Callaghan…

Callahan— the simplified spelling of the same surname
Sullivan— the fellow grand Irish surname favorite
Finnegan— a companion jaunty Irish pick
Donavan— another Irish name
Kilian— echoes that soft -an sound

Explore names like Callaghan

By themesurname-nameirishroyal
By meaningLightRoyal / Noble

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Frequently Asked

What does the name Callaghan mean?

Callaghan comes from Irish Ó Ceallacháin, 'descendant of Cellachán', a Munster king's name variously read as 'bright-headed' or linked to 'strife' or 'church'.

How do you pronounce Callaghan?

It's said KAL-ə-han /ˈkæl.ə.hæn/ — three syllables, stress on the first.

Is Callaghan a boy or girl name?

Callaghan is a boy's name.

How popular is Callaghan?

Callaghan is a rare first name in the U.S.

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