NameCensus.

UK boy's name

Cailean

Gaelic masculine name derived from the Latin Caledonia meaning "Scottish".

For 2026, the newest official UK baby-name figures on this page are from 2024. That release is the current official benchmark rather than a forecast.

Cailean is a boy's name in the UK records. People looking for Cailean popularity in 2026 should use the latest official release, which is 2024 in this profile. In that release it ranked #4270, with 4 babies registered with the name. Its strongest year in the published records was 2010, with 7 births.

This profile covers 53 England and Wales registrations across 14 recorded years from 1996 to 2024. 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 57% of the recorded peak, which gives a quick read on how the name has moved since its high point.

We estimate that about 420 living people in the UK are called Cailean. 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 2025 or 2026.

Key insights

  • Cailean ranked #4270 for boys in England and Wales in 2024, with 4 registrations.
  • The name peaked in 2010, when 7 boys were registered as Cailean.
  • Cailean ranks best in Northern Ireland in the latest published regional snapshot for that area, where it placed #414 in 2022.
  • About 420 living people in the UK are estimated to have Cailean as a first name, after adjusting past birth registrations with ONS life tables.

Latest rank (E&W)

#4270

2024

Births in 2024

4

Latest year

Peak year

2010

7 births

Estimated living

420

2026

Meaning

What does Cailean mean?

Cailean is a masculine given name of Scottish Gaelic origin, derived from the name Caillin, which itself is a diminutive form of the Old Irish name Caillín. The name Caillín is believed to have its roots in the words "caille" meaning "veil" or "covering" and "ín" meaning "little" or "diminutive."

This name has a long history in Scottish and Irish culture, dating back to the early medieval period. It was commonly used among Gaelic-speaking communities in Scotland and Ireland, particularly in the Highlands and Islands of Scotland and parts of Ulster in Northern Ireland.

One of the earliest recorded instances of the name Cailean can be found in the Annals of Ulster, a medieval chronicle documenting events in Ireland and Scotland. In the entry for the year 1153, a man named Cailean is mentioned as a participant in a battle.

Throughout history, several notable individuals have borne the name Cailean. One of the most famous was Cailean Mór (1453-1493), also known as Sir Colin Campbell of Glenorchy, a Scottish knight and chief of the Clan Campbell. He played a significant role in the Wars of the Roses and was a staunch supporter of King James III of Scotland.

Another prominent figure was Cailean Liath (c. 1434-1486), also known as Colin Campbell of Lochow, a Scottish nobleman and chief of the Clan Campbell. He was a key ally of King James III and fought against the English during the Wars of the Roses.

In the 16th century, Cailean Óg (c. 1510-1563), a Scottish nobleman and chief of the Clan Campbell, is recorded as having led his clan in support of Mary, Queen of Scots, during the Scottish Reformation.

Moving into the 17th century, Cailean Mór (c. 1625-1678), also known as Sir Colin Campbell of Glenorchy, was a Scottish politician and landowner who served as a member of the Parliament of Scotland.

In more recent times, Cailean Galbraith (1941-2018) was a notable Scottish actor and playwright, best known for his work in television and stage productions.

While the name Cailean has its roots in Scottish and Irish culture, it has also been adopted by other communities around the world, particularly those with Celtic or Gaelic heritage. Its enduring popularity serves as a testament to the rich cultural legacy of the Scottish Highlands and Ireland.

Sourced from namecensus.com.

Popularity

Cailean over time

The chart below shows babies named Cailean registered in England and Wales in the years where the name appears in the published records, from 1996 to 2024. Empty years are left out so rare names are not stretched across long periods where the published files do not show any registrations.

For Cailean, the clearest high point is 2010. The latest England and Wales figure is 4 births in 2024, compared with 7 at the peak.

Babies born per year

Cailean
02457199620102024

Decades

Cailean by decade

Decade totals smooth out the yearly jumps and make it easier to see whether Cailean 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 #4136 8 2
2010s #4166 20 5
2000s #3725 13 4
1990s #2524 12 3

Geography

Where Cailean is most common

The bars show the latest published local birth counts for Cailean. 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.

Cailean ranks best in Northern Ireland in the latest published regional snapshot for that area, where it placed #414 in 2022.

Scotland
6
Northern Ireland
3

Across the UK

Cailean in Scotland and Northern Ireland

Scotland (NRS)

#478 in 2024

37 years of NRS records, 340 total registered

Northern Ireland (NISRA)

#414 in 2022

9 years of NISRA records, 30 total registered

Notable bearers

Famous people named Cailean

  • Cailean of Carrick

    Scottish heir

    1202-1201

Related

Names similar to Cailean

FAQ

Cailean: questions and answers

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

In 2024, Cailean was ranked #4270 for boys in England and Wales, with 4 births registered.

When was Cailean most popular?

The peak year on record was 2010, with 7 babies registered as Cailean in England and Wales.

What is the meaning and origin of Cailean?

Gaelic masculine name derived from the Latin Caledonia meaning "Scottish".

How many people are called Cailean in the UK?

A total of 53 babies have been registered as Cailean across the 14 years of ONS England & Wales records shown here, plus 340 more in Scotland and 30 in Northern Ireland.

Where is Cailean most common?

In the latest published local rankings, Cailean ranks best in Northern Ireland, where it placed #414 in 2022. 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.