NameCensus.

UK boy's name

Killian

Masculine given name of Irish origin meaning "bright-headed" or "bright-headed lad".

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.

Killian is a boy's name in the UK records. People looking for Killian popularity in 2026 should use the latest official release, which is 2024 in this profile. In that release it ranked #638, with 59 babies registered with the name. Its strongest year in the published records was 2022, with 79 births.

This profile covers 818 England and Wales registrations across 29 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 75% of the recorded peak, which gives a quick read on how the name has moved since its high point.

We estimate that about 1,160 living people in the UK are called Killian. 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

  • Killian ranked #638 for boys in England and Wales in 2024, with 59 registrations.
  • The name peaked in 2022, when 79 boys were registered as Killian.
  • Killian ranks best in Northern Ireland in the latest published regional snapshot for that area, where it placed #187 in 2024.
  • About 1,160 living people in the UK are estimated to have Killian as a first name, after adjusting past birth registrations with ONS life tables.

Latest rank (E&W)

#638

2024

Births in 2024

59

Latest year

Peak year

2022

79 births

Estimated living

1,160

2026

Meaning

What does Killian mean?

The name Killian has its origins in the Celtic and Gaelic languages, derived from the Irish word "cill," meaning church or monastery. It first emerged as a personal name in Ireland during the early medieval period, around the 5th or 6th century AD.

One of the earliest recorded instances of the name Killian can be found in the Annals of Ulster, an ancient chronicle that dates back to the 15th century. The Annals mention a Killian mac Dregain, who was the abbot of the monastery at Iona in the late 7th century.

The name Killian gained wider recognition with the life of Saint Killian, an Irish missionary who lived in the 7th century. He is known for his efforts in spreading Christianity in the Franconian region of modern-day Germany. Saint Killian was martyred around 689 AD and is venerated as the patron saint of the diocese of Würzburg.

Throughout the Middle Ages, the name Killian was popular among Irish and Scottish families, particularly those with connections to monastic communities or religious orders. One notable historical figure with this name was Killian of Leinsker, a 12th-century Irish poet and cleric.

As the name spread across Europe, it evolved into various spellings and forms, such as Kilian, Kilián, and Kiliaan. In the 16th century, the Dutch painter Kiliaan Rombouts (1599-1655) gained recognition for his religious works and portraits.

Another famous bearer of the name was Kilian Ignaz Dientzenhofer (1689-1751), a Bavarian architect who designed numerous churches and palaces in the Baroque style, including the Monastery of Banz and the Benedictine Abbey of Ottobeuren.

In more recent times, the name Killian has been associated with notable figures like Killian Jordan (1904-1989), an Irish politician and member of the Dáil Éireann, and Killian Mullarney (born 1949), an Irish ornithologist and author known for his contributions to bird field guides.

While the name Killian has maintained a presence throughout history, its popularity has waxed and waned in different regions and cultures. Its enduring connection to religious and monastic traditions, however, remains a significant aspect of its rich historical significance.

Sourced from namecensus.com.

Popularity

Killian over time

The chart below shows babies named Killian 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 Killian, the clearest high point is 2022. The latest England and Wales figure is 59 births in 2024, compared with 79 at the peak.

Babies born per year

Killian
020405979199620102024

Decades

Killian by decade

Decade totals smooth out the yearly jumps and make it easier to see whether Killian 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 #579 326 5
2010s #1425 326 10
2000s #1446 127 10
1990s #1290 39 4

Geography

Where Killian is most common

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

Killian ranks best in Northern Ireland in the latest published regional snapshot for that area, where it placed #187 in 2024.

Scotland
15
Northern Ireland
11

Across the UK

Killian in Scotland and Northern Ireland

Scotland (NRS)

#268 in 2024

12 years of NRS records, 116 total registered

Northern Ireland (NISRA)

#187 in 2024

27 years of NISRA records, 233 total registered

Related

Names similar to Killian

FAQ

Killian: questions and answers

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

In 2024, Killian was ranked #638 for boys in England and Wales, with 59 births registered.

When was Killian most popular?

The peak year on record was 2022, with 79 babies registered as Killian in England and Wales.

What is the meaning and origin of Killian?

Masculine given name of Irish origin meaning "bright-headed" or "bright-headed lad".

How many people are called Killian in the UK?

A total of 818 babies have been registered as Killian across the 29 years of ONS England & Wales records shown here, plus 116 more in Scotland and 233 in Northern Ireland.

Where is Killian most common?

In the latest published local rankings, Killian ranks best in Northern Ireland, where it placed #187 in 2024. 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.