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Home › Baby Names Directory › Caoilainn

Caoilainn

♀ Girl

Pronounced KEE-lin /ˈkiː.lɪn/Low

Meaning: Caoilainn is an Irish girl's name, a form of Caoilfhionn, built from the Irish caol, 'slender,' and fionn, 'fair' or 'white' - together 'slender and fair.' The traditional spelling looks daunting to non-Irish readers but is pronounced simply, usually KEE-lin or KWEE-lin. It is a genuine Gaelic heritage name, not a modern coinage.Low

In 30 seconds: Caoilainn is an Irish girl's name from Caoilfhionn, 'slender and fair.' It appears in US records around 2013 (said KEE-lin).
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Origin MediumIrish
MeaningCaoilainn is an Irish girl's name, a form of Caoilfhionn, built from the Irish caol, 'slender,' and fionn, 'fair' or 'white' - together 'slender and fair.' The traditional spelling looks daunting to non-Irish readers but is pronounced simply, usually KEE-lin or KWEE-lin. It is a genuine Gaelic heritage name, not a modern coinage.
U.S. rank (2016)#16742 ↘ Falling
2016 U.S. births5 girls (0.00% of U.S. girls)
Peak year2013
Total births (all-time)≈ 91

Popularity in the U.S. · SSA data

peak 201320042016

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

Caoilainn is a traditional Irish name, a form of Caoilfhionn, from caol, 'slender,' and fionn, 'fair.' It belongs to the Gaelic revival of native Irish names and reached American records with Irish families and heritage-minded parents. The spelling is authentically Irish; in speech it is KEE-lin or KWEE-lin, and its meaning, 'slender and fair,' is well documented.

It was never common in the United States, given to only about fifteen girls a year even at its peak around 2013. A girl named Caoilainn then is a young teen today.

Did you know? The Irish spelling Caoilainn looks far longer than it sounds: the cluster 'caoil' is simply 'kee' or 'kwee,' a good example of how Gaelic spelling and speech diverge.
Overall data confidence 40%
References - Caoilainn — Irish form of Caoilfhionn; caol 'slender' + fionn 'fair'; KEE-lin/KWEE-lin; Gaelic heritage name.

Variations

CaoilfhionnKeelinCaoilinnKaelin

Nicknames

KeeleyKeeLin

Famous Bearers

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If you like Caoilainn…

Keelin— the anglicized spelling of the same name
Caoimhe— a like traditional Irish girls' name
Niamh— another Gaelic name with tricky spelling
Saoirse— a comparable revived Irish heritage name

Explore names like Caoilainn

By themerareheritageirishgaelic

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Frequently Asked

What does the name Caoilainn mean?

It is an Irish name, a form of Caoilfhionn, from caol, 'slender,' and fionn, 'fair' - 'slender and fair.'

How do you pronounce Caoilainn?

It is said KEE-lin /ˈkiː.lɪn/ - two syllables, stress on the first; some families say KWEE-lin.

Is Caoilainn a boy or girl name?

Caoilainn is used as a girl's name.

How popular is Caoilainn?

It was always rare in the United States, given to only about fifteen girls a year even at its peak in the twenty-tens.

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