NameCensus.

UK girl's name

Caithlin

Its meaning as a given name is Gaelic for "little pure one".

For 2026, the newest official UK baby-name figures on this page are from 2000. That release is the current official benchmark rather than a forecast.

Caithlin is a girl's name in the UK records. People looking for Caithlin popularity in 2026 should use the latest official release, which is 2000 in this profile. In that release it ranked #3912, with 3 babies registered with the name. Its strongest year in the published records was 2000, with 3 births.

This profile covers 3 England and Wales registrations across 1 recorded years from 2000 to 2000. The figures come from ONS England and Wales 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.

Caithlin is at its recorded peak in the England and Wales series.

We estimate that about 19 living people in the UK are called Caithlin. 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 2001 or 2026.

Key insights

  • Caithlin ranked #3912 for girls in England and Wales in 2000, with 3 registrations.
  • The name peaked in 2000, when 3 girls were registered as Caithlin.
  • Caithlin ranks best in Northern Ireland in the latest published regional snapshot for that area, where it placed #384 in 2006.
  • About 19 living people in the UK are estimated to have Caithlin as a first name, after adjusting past birth registrations with ONS life tables.

Latest rank (E&W)

#3912

2000

Births in 2000

3

Latest year

Peak year

2000

3 births

Estimated living

19

2026

Meaning

What does Caithlin mean?

The given name Caithlin is an Anglicized form of the Irish Gaelic name Caitlín, which is the diminutive of Caitríona, the Gaelic equivalent of Catherine. The name Caitríona is derived from the ancient Greek name Aikaterínē, which is believed to have originated from the Greek word katharós, meaning "pure."

The earliest recorded use of the name Caitlín dates back to the 16th century in Ireland. It was particularly popular among the Irish nobility and was often associated with strength and resilience. In ancient Irish literature, there are references to historical figures bearing this name, such as Caitlín Ní Bhuadhaigh, a 15th-century Irish noblewoman known for her patronage of the arts.

One of the earliest recorded individuals with the name Caithlin was Caithlin Dhubh Ó Conchobhair, a 14th-century Irish chieftain and warrior who played a significant role in the Irish campaigns against English rule. Another notable bearer of this name was Caithlin Ní Mhaonaigh, a 17th-century Irish poet and composer renowned for her stirring works celebrating Irish culture and heritage.

In the 18th century, Caithlin Mac Cionnaith was a renowned Irish harpist and musician who performed for various European courts and helped preserve traditional Irish music. During the same period, Caithlin Ní Uallacháin was a celebrated Irish scholar and educator who contributed significantly to the preservation of the Irish language and literature.

In the 19th century, Caithlin Ní Mhuiríosa was an Irish nationalist and activist who played a pivotal role in the Irish independence movement. She was known for her eloquent speeches and unwavering commitment to the cause of Irish freedom.

While the name Caithlin has roots in Irish culture and history, it has also been embraced by individuals from various backgrounds and nationalities throughout the centuries, reflecting the rich diversity and interconnectedness of human societies.

Sourced from namecensus.com.

Decades

Caithlin by decade

Decade totals smooth out the yearly jumps and make it easier to see whether Caithlin 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
2000s #3912 3 1

Geography

Where Caithlin is most common

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

Caithlin ranks best in Northern Ireland in the latest published regional snapshot for that area, where it placed #384 in 2006.

Northern Ireland
3

Across the UK

Caithlin in Scotland and Northern Ireland

Northern Ireland (NISRA)

#384 in 2006

5 years of NISRA records, 16 total registered

Related

Names similar to Caithlin

FAQ

Caithlin: questions and answers

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

In 2000, Caithlin was ranked #3912 for girls in England and Wales, with 3 births registered.

When was Caithlin most popular?

The peak year on record was 2000, with 3 babies registered as Caithlin in England and Wales.

What is the meaning and origin of Caithlin?

Its meaning as a given name is Gaelic for "little pure one".

How many people are called Caithlin in the UK?

A total of 3 babies have been registered as Caithlin across the 1 years of ONS England & Wales records shown here and 16 in Northern Ireland.

Where is Caithlin most common?

In the latest published local rankings, Caithlin ranks best in Northern Ireland, where it placed #384 in 2006. 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.