NameCensus.

UK name, mostly girls

Cailin

A feminine name of Irish origin meaning "maid or maiden".

For 2026, the newest official UK baby-name figures on this page are from 2020. That release is the current official benchmark rather than a forecast.

Cailin is mostly registered for girls in the UK records. People looking for Cailin popularity in 2026 should use the latest official release, which is 2020 in this profile. In that release it ranked #5493, with 3 babies registered with the name. Its strongest year in the published records was 2004, with 15 births.

This profile covers 147 England and Wales registrations across 20 recorded years from 1996 to 2020. The figures come from ONS England and Wales, NRS Scotland and NISRA Northern Ireland, so the page is a view of published baby-name registrations rather than a forecast or a live count of people using the name today.

The latest count is about 20% of the recorded peak, which gives a quick read on how the name has moved since its high point.

We estimate that about 245 living people in the UK are called Cailin. This uses published birth registrations from England and Wales, Scotland and Northern Ireland, then applies ONS national life tables to estimate how many are likely still alive. It does not forecast extra births for 2021 or 2026.

Key insights

  • Cailin ranked #5493 for girls in England and Wales in 2020, with 3 registrations.
  • The name peaked in 2004, when 15 girls were registered as Cailin.
  • Cailin ranks best in Northern Ireland in the latest published regional snapshot for that area, where it placed #434 in 2018.
  • About 245 living people in the UK are estimated to have Cailin as a first name, after adjusting past birth registrations with ONS life tables.
  • Across the England and Wales records shown here, 98.0% of Cailin registrations are for girls.

Latest rank (E&W)

#5493

2020

Births in 2020

3

Latest year

Peak year

2004

15 births

Estimated living

245

2026

Gender

Boy and girl registrations for Cailin

In England and Wales birth records, Cailin has been registered for both boys and girls. Across the years shown here, 2.0% of registrations are for boys and 98.0% are for girls.

These figures use the sex categories in the published baby-name files. They are useful for spotting how the name is used at registration, but they are not a live measure of gender identity or everyone living with the name today.

98% girls
Boys3 (2.0%)Girls147 (98.0%)

Cailin registered for boys

  • Ranked #4,685 in 2013
  • 3 boys registered in 2013
  • Peak: 2013 (3 births)

Cailin registered for girls

  • Ranked #5,493 in 2020
  • 3 girls registered in 2020
  • Peak: 2004 (15 births)

Meaning

What does Cailin mean?

The given name Cailin has its origins in the Irish Gaelic language, where it was originally spelled as Cailin or Cailín. This name derives from the ancient Irish word "caille," which means "girl" or "maiden." It emerged as a popular name among the Irish people during the Middle Ages, particularly in the 8th to 12th centuries.

Cailin was a common name in Ireland, especially in the western regions like Connacht and Munster. It was often used as a diminutive form of the name Cailleach, which referred to an ancient Celtic goddess associated with the earth and fertility.

While there are no specific mentions of the name Cailin in ancient Irish texts or religious scriptures, it was undoubtedly a part of the Irish naming tradition during the medieval period. The earliest recorded examples of the name can be found in various Irish genealogical records and historical documents from the 10th century onwards.

Throughout history, several notable individuals bore the name Cailin. One of the earliest was Cailin Muimnech, an Irish monk and scholar who lived in the 9th century and was renowned for his knowledge of the Latin language.

Another significant figure was Cailin Ó Duibhir, an Irish poet and historian who lived in the 16th century and is known for his work "Topographia Hibernica," a detailed description of Ireland's geography and history.

In the 17th century, Cailin Ní Mhuircheartaigh was a prominent Irish noblewoman and the wife of Ruairí Ó Mórdha, the last inaugurated Chief of Laois. She played a crucial role in preserving Irish culture and tradition during the tumultuous period of English colonization.

Moving to the 18th century, Cailin Nic an Bhaird was a celebrated Irish harpist and composer who contributed significantly to the preservation of traditional Irish music.

In more recent times, Cailin Beirne (1910-1998) was an Irish writer and journalist known for her works exploring the lives of women in rural Ireland.

It's important to note that while the name Cailin has its roots in Irish Gaelic culture, it has also gained popularity in other English-speaking countries, particularly in the United States and Canada, where it is often spelled as Cailin or Kaylin.

Sourced from namecensus.com.

Popularity

Cailin over time

The chart below compares boys and girls registered as Cailin in England and Wales, from 1996 to 2020. Empty years are left out so rare names are not stretched across long periods where the published files do not show any registrations.

For Cailin, the clearest high point is 2004. The latest England and Wales figure is 3 births in 2020, compared with 15 at the peak.

Babies born per year

BoysGirls
0481115199620082020

Decades

Cailin by decade

Decade totals smooth out the yearly jumps and make it easier to see whether Cailin was a short-lived spike or a name that stayed in regular use. Average rank is calculated only from years where a published rank exists.

Decade Average rank Total births Years covered
2020s #5493 3 1
2010s #4442 29 6
2000s #2039 94 9
1990s #2773 21 4

Geography

Where Cailin is most common

The bars show the latest published local birth counts for Cailin. They are useful for spotting where the name is showing up in real numbers, while the rank beside each bar shows how strongly it performs inside that region.

Cailin ranks best in Northern Ireland in the latest published regional snapshot for that area, where it placed #434 in 2018.

Scotland
4
Northern Ireland
3

Across the UK

Cailin in Scotland and Northern Ireland

Scotland (NRS)

#674 in 2011

14 years of NRS records, 65 total registered

Northern Ireland (NISRA)

#434 in 2018

9 years of NISRA records, 34 total registered

Related

Names similar to Cailin

FAQ

Cailin: questions and answers

How popular is the name Cailin in the UK right now?

In 2020, Cailin was ranked #5493 for girls in England and Wales, with 3 births registered.

When was Cailin most popular?

The peak year on record was 2004, with 15 babies registered as Cailin in England and Wales.

What is the meaning and origin of Cailin?

A feminine name of Irish origin meaning "maid or maiden".

How many people are called Cailin in the UK?

A total of 147 babies have been registered as Cailin across the 20 years of ONS England & Wales records shown here, plus 65 more in Scotland and 34 in Northern Ireland.

Where is Cailin most common?

In the latest published local rankings, Cailin ranks best in Northern Ireland, where it placed #434 in 2018. The regional bars on this page use birth counts, so they also reflect the size of each region.

Which records is this page based on?

The England and Wales timeline uses ONS baby-name records. Scotland figures come from NRS and Northern Ireland figures come from NISRA. Counts are registrations in published baby-name files. The living estimate uses those birth registrations with ONS national life tables.