NameCensus.

UK girl's name

Kailyn

A feminine name of American origin meaning "pure".

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.

Kailyn is a girl's name in the UK records. People looking for Kailyn popularity in 2026 should use the latest official release, which is 2024 in this profile. In that release it ranked #4843, with 4 babies registered with the name. Its strongest year in the published records was 2011, with 10 births.

This profile covers 62 England and Wales registrations across 12 recorded years from 2004 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 40% of the recorded peak, which gives a quick read on how the name has moved since its high point.

We estimate that about 96 living people in the UK are called Kailyn. 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

  • Kailyn ranked #4843 for girls in England and Wales in 2024, with 4 registrations.
  • The name peaked in 2011, when 10 girls were registered as Kailyn.
  • Kailyn ranks best in Scotland in the latest published regional snapshot for that area, where it placed #537 in 2014.
  • About 96 living people in the UK are estimated to have Kailyn as a first name, after adjusting past birth registrations with ONS life tables.

Latest rank (E&W)

#4843

2024

Births in 2024

4

Latest year

Peak year

2011

10 births

Estimated living

96

2026

Meaning

What does Kailyn mean?

The name Kailyn is a relatively modern variation of the traditional name Caitlin or Kathleen, which originated from the Gaelic language spoken in Ireland, Scotland, and the Isle of Man. The name Caitlin itself is derived from the ancient Irish name Caitlín, a diminutive form of the name Caitríona, which means "pure" or "strong."

In the early Middle Ages, the name Caitríona was popular among the Celtic cultures of Ireland and Scotland, often given to young girls as a symbol of purity and strength. As the name spread through different regions and dialects, it evolved into various spellings and pronunciations, such as Kathleen, Caitlin, and eventually Kailyn.

While there are no clear historical records of the name Kailyn itself appearing in ancient texts or religious scriptures, its roots can be traced back to the early Christian era in Ireland. The earliest recorded examples of the name Caitríona and its variations can be found in ancient Irish manuscripts and genealogical records from the 6th to 9th centuries.

Throughout history, several notable individuals have borne the name Caitlin or its variations. One of the earliest recorded was Saint Caitríona of Ardrahan, an Irish nun and abbess who lived in the 6th century. Another notable figure was Caitlín Ní Uallacháin, an Irish noblewoman and patron of the arts who lived in the 16th century.

In literature, the name Caitlin gained prominence through the works of Welsh poet Dylan Thomas, who immortalized his wife Caitlin Macnamara in his writing. Other famous historical figures with the name Caitlin or its variations include Caitlin Jenner, an American Olympic gold medalist and television personality (born 1949); Caitlin Moran, a British journalist and author (born 1975); and Caitlyn Stark, an American actress (born 1988).

As for the specific spelling of Kailyn, it is a more recent variation that emerged in the late 20th century, likely influenced by the popularity of unique and creative spellings in modern times. While it lacks the same historical depth as the traditional forms, the name Kailyn carries the essence of its Celtic roots, representing purity, strength, and a connection to the rich cultural heritage of Ireland and Scotland.

Sourced from namecensus.com.

Popularity

Kailyn over time

The chart below shows babies named Kailyn registered in England and Wales in the years where the name appears in the published records, from 2004 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 Kailyn, the clearest high point is 2011. The latest England and Wales figure is 4 births in 2024, compared with 10 at the peak.

Babies born per year

Kailyn
035810200420142024

Decades

Kailyn by decade

Decade totals smooth out the yearly jumps and make it easier to see whether Kailyn 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 #4843 4 1
2010s #3989 36 6
2000s #4176 22 5

Geography

Where Kailyn is most common

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

Kailyn ranks best in Scotland in the latest published regional snapshot for that area, where it placed #537 in 2014.

Scotland
6

Across the UK

Kailyn in Scotland and Northern Ireland

Scotland (NRS)

#537 in 2014

7 years of NRS records, 34 total registered

Related

Names similar to Kailyn

FAQ

Kailyn: questions and answers

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

In 2024, Kailyn was ranked #4843 for girls in England and Wales, with 4 births registered.

When was Kailyn most popular?

The peak year on record was 2011, with 10 babies registered as Kailyn in England and Wales.

What is the meaning and origin of Kailyn?

A feminine name of American origin meaning "pure".

How many people are called Kailyn in the UK?

A total of 62 babies have been registered as Kailyn across the 12 years of ONS England & Wales records shown here, plus 34 more in Scotland.

Where is Kailyn most common?

In the latest published local rankings, Kailyn ranks best in Scotland, where it placed #537 in 2014. 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.