unisex name
Callahan
KAL-uh-han
- Origin Irish
- Gender Unisex
- Syllables 3
- Letters 8
- Popularity Top 1000 (US)
- Births on record 7,310
the United States
#227
2025 births
Callahan is a unisex name of Irish origin, anglicized from Ó Ceallacháin. Its root, ceallach, is genuinely contested: reference sources give it as bright-headed, as a word for strife, and as a term connected to churches, and no reading has settled as correct.
- Callahan is a name of Irish origin.
- Peaked in 2025, when 1,682 babies were given the name.
- It has been rising over the past decade.
- Today about 1 in 1,971 babies in the United States is given this name.
- First appears in US birth records in 1983.
- 3 syllables, with the stress on syllable 1.
Callahan over time
Births per decade in the United States, 1980s to 2020s. The striped bar is the 2020s, still in progress — it covers 2020 to 2025, not a full ten years.
Show the numbers
| Decade | Births |
|---|---|
| 1980s | 64 |
| 1990s | 269 |
| 2000s | 513 |
| 2010s | 1,342 |
| 2020s (to 2025) | 4,843 |
What Callahan means
Callahan descends from the Irish personal name Ceallachán, a diminutive of Ceallach. What Ceallach itself meant is disputed — bright-headed, strife, and church-goer are all offered by serious sources, which is more honest to report than to pick one.
Where Callahan comes from
Callahan comes from Ó Ceallacháin, descendant of Ceallachán, and the family traces to Cellachán of Cashel, a tenth-century king of Munster whose descendants took his name. The underlying element ceallach is where agreement ends: some derive it from ceall, a church or monastic cell, giving a sense of one associated with a church; others read it as an old word for strife or contention; a third tradition glosses it as bright-headed. Irish name scholarship has not resolved this, and pages that state one meaning flatly are choosing rather than reporting. As a first name it is recent, following the American fashion for Irish surnames.
Callahan in use
Callahan appears in four of the seven countries we track and reached its highest recorded use in 2025.
How popular is Callahan?
In 2025, Callahan was given to 1,682 babies in the United States, ranking #227 that year. It is a well-established, commonly used name.
Where Callahan is used
US figures omit any name given to fewer than five babies in a year, so the rarest names are absent from the source rather than absent from use. Data & sources.
Names that peaked alongside Callahan
These names rose and fell in the same era, which is why they tend to sound like they belong together.
Parents who like Callahan also like
Names whose popularity has risen and fallen in step with Callahan over the last century — the same taste, a different name.
5 nicknames for Callahan
Each one is a name in its own right — the figure underneath is how it is doing today, so you can see which short forms are rising and which have faded.
Callahan in other languages
The same name as it is spelled elsewhere — not shortenings, and not different names that merely sound alike. Each one has its own record here.
Sibling names for Callahan
Names from the same era that won't rhyme or share an initial with Callahan — the two things that make a sibling set grate.
Common questions about Callahan
What does the name Callahan mean?
The meaning is genuinely disputed. Sources variously give bright-headed, strife, and a sense connected to churches, and Irish name scholarship has not settled between them.
Is Callahan an Irish name?
Yes. It anglicizes Ó Ceallacháin and traces to Cellachán of Cashel, a tenth-century king of Munster.
How do you spell Callahan?
Callahan is the usual American spelling and Callaghan the usual Irish one. They are the same name.
How popular is the name Callahan?
In 2025, Callahan was given to 1,682 babies in the United States, ranking #227 that year. It is a well-established, commonly used name.
Is Callahan a girl's or a boy's name?
Callahan is used for both girls and boys. About 14% of recorded births with this name are girls.
How many syllables are in Callahan?
Callahan has 3 syllables.
When was Callahan most popular?
Callahan peaked in 2025, when 1,682 babies were given the name. It has been rising over the past decade.
What are the nicknames for Callahan?
Callahan is usually shortened to Cal, Callie, Calvin, Callum and Callan.
Is Callahan a good name?
That is not something records can settle, but they can tell you what you would be choosing. Callahan currently ranks #227 in the United States. It has been rising over the past decade. Everything else — how it sounds with your surname, who it reminds you of — is yours.