NameCensus.

UK boy's name

Kailen

A gender-neutral name of uncertain origin, possibly a variant of "Kaylin".

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.

Kailen is a boy's name in the UK records. People looking for Kailen popularity in 2026 should use the latest official release, which is 2024 in this profile. In that release it ranked #2263, with 10 babies registered with the name. Its strongest year in the published records was 2017, with 29 births.

This profile covers 340 England and Wales registrations across 26 recorded years from 1996 to 2024. The figures come from ONS England and Wales and NRS Scotland, 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 34% of the recorded peak, which gives a quick read on how the name has moved since its high point.

We estimate that about 349 living people in the UK are called Kailen. 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

  • Kailen ranked #2263 for boys in England and Wales in 2024, with 10 registrations.
  • The name peaked in 2017, when 29 boys were registered as Kailen.
  • Kailen ranks best in Scotland in the latest published regional snapshot for that area, where it placed #720 in 2021.
  • About 349 living people in the UK are estimated to have Kailen as a first name, after adjusting past birth registrations with ONS life tables.

Latest rank (E&W)

#2263

2024

Births in 2024

10

Latest year

Peak year

2017

29 births

Estimated living

349

2026

Meaning

What does Kailen mean?

The name Kailen is of Scottish Gaelic origin, derived from the ancient Celtic word "cailean," which means "whelp" or "young wolf." It is believed to have emerged during the Middle Ages, around the 11th or 12th century, when the Scottish Highlands were still predominantly inhabited by Gaelic-speaking clans and tribes.

In its earliest form, the name was spelled "Cailean" or "Cailen," and it was commonly bestowed upon young boys born into Highland warrior families. The name carried connotations of strength, courage, and fierceness, which were highly prized qualities among the Celtic warriors of that era.

One of the earliest recorded instances of the name can be found in the ancient Gaelic manuscript known as the "Book of Deer," which dates back to the 9th or 10th century. This manuscript contains genealogies and records of the Pictish and Scottish nobility, and it includes several references to individuals bearing the name Cailean or variations thereof.

Throughout the centuries, the name has undergone various spelling variations, including Cailean, Cailen, Kalen, Kaylen, and eventually settling on the modern spelling of Kailen. This evolution likely occurred as the name spread beyond the Scottish Highlands and was adapted to different linguistic and cultural contexts.

One of the earliest known historical figures to bear the name Kailen was Cailean Mór, a powerful Scottish nobleman and Chief of the Clan MacLean in the 13th century. He played a significant role in the Wars of Scottish Independence against England and was renowned for his military prowess.

Another notable bearer of the name was Kailen O'Shaughnessy, an Irish chieftain and warrior who lived in the 15th century. He was known for his fierce resistance against English rule in Ireland and his defense of the traditional Gaelic way of life.

In the 16th century, Kailen MacGregor was a prominent member of the Clan Gregor, a Highland Scottish clan renowned for their martial skills. He is said to have participated in several battles against rival clans and the English forces during the turbulent period of Scottish history.

Fast-forwarding to the 19th century, Kailen McCallum was a Scottish poet and writer who contributed to the preservation of Gaelic literature and culture. His works celebrated the rich heritage and traditions of the Scottish Highlands.

More recently, in the 20th century, Kailen Tompkins was a renowned American mountaineer and explorer who led several expeditions to some of the world's highest peaks, including Mount Everest and K2.

Sourced from namecensus.com.

Popularity

Kailen over time

The chart below shows babies named Kailen 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 Kailen, the clearest high point is 2017. The latest England and Wales figure is 10 births in 2024, compared with 29 at the peak.

Babies born per year

Kailen
07152229199620102024

Decades

Kailen by decade

Decade totals smooth out the yearly jumps and make it easier to see whether Kailen 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 #2586 49 5
2010s #1384 197 10
2000s #1867 85 9
1990s #2179 9 2

Geography

Where Kailen is most common

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

Kailen ranks best in Scotland in the latest published regional snapshot for that area, where it placed #720 in 2021.

Scotland
3

Across the UK

Kailen in Scotland and Northern Ireland

Scotland (NRS)

#720 in 2021

3 years of NRS records, 11 total registered

Related

Names similar to Kailen

FAQ

Kailen: questions and answers

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

In 2024, Kailen was ranked #2263 for boys in England and Wales, with 10 births registered.

When was Kailen most popular?

The peak year on record was 2017, with 29 babies registered as Kailen in England and Wales.

What is the meaning and origin of Kailen?

A gender-neutral name of uncertain origin, possibly a variant of "Kaylin".

How many people are called Kailen in the UK?

A total of 340 babies have been registered as Kailen across the 26 years of ONS England & Wales records shown here, plus 11 more in Scotland.

Where is Kailen most common?

In the latest published local rankings, Kailen ranks best in Scotland, where it placed #720 in 2021. 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.