NameCensus.

UK name, mostly boys

Fionn

An Irish name meaning fair or light-haired.

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.

Fionn is mostly registered for boys in the UK records. People looking for Fionn popularity in 2026 should use the latest official release, which is 2024 in this profile. In that release it ranked #757, with 45 babies registered with the name. Its strongest year in the published records was 2022, with 69 births.

This profile covers 980 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 65% of the recorded peak, which gives a quick read on how the name has moved since its high point.

We estimate that about 2,257 living people in the UK are called Fionn. 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

  • Fionn ranked #757 for boys in England and Wales in 2024, with 45 registrations.
  • The name peaked in 2022, when 69 boys were registered as Fionn.
  • Fionn ranks best in Northern Ireland in the latest published regional snapshot for that area, where it placed #26 in 2024.
  • About 2,257 living people in the UK are estimated to have Fionn as a first name, after adjusting past birth registrations with ONS life tables.
  • Across the England and Wales records shown here, 96.6% of Fionn registrations are for boys.

Latest rank (E&W)

#757

2024

Births in 2024

45

Latest year

Peak year

2022

69 births

Estimated living

2,257

2026

Gender

Boy and girl registrations for Fionn

In England and Wales birth records, Fionn has been registered for both boys and girls. Across the years shown here, 96.6% of registrations are for boys and 3.4% are for girls.

These figures use the sex categories in the published baby-name files. They are useful for spotting how the name is used at registration, but they are not a live measure of gender identity or everyone living with the name today.

97% boys
Boys980 (96.6%)Girls35 (3.4%)

Fionn registered for boys

  • Ranked #757 in 2024
  • 45 boys registered in 2024
  • Peak: 2022 (69 births)

Fionn registered for girls

  • Ranked #4,598 in 2004
  • 3 girls registered in 2004
  • Peak: 1997 (7 births)

Meaning

What does Fionn mean?

The given name Fionn has its origins in the Irish Gaelic language, where it is rendered as Fionn or Finn. It is an ancient name with roots dating back to the 3rd century AD, or possibly even earlier. In Irish mythology, Fionn mac Cumhaill was a legendary hunter-warrior who led the Fianna, a band of elite mercenary soldiers.

The name Fionn is derived from the Old Irish word "finn," meaning "fair-haired" or "white." This likely referred to the pale complexion or blond hair associated with the ancient Celtic tribes of Ireland. Variations of the name include Finn, Fyn, and the feminine form Fiona.

One of the earliest recorded examples of the name Fionn can be found in the Fenian Cycle of Irish mythology, a collection of stories and legends that revolve around the exploits of Fionn mac Cumhaill and his band of warriors. These tales were passed down orally for centuries before being written down in the 12th century.

Throughout history, several notable figures have borne the name Fionn or one of its variants. One of the earliest was Fionn mac Áedha, an Irish king who ruled the Kingdom of Munster in the 7th century AD. Another was Finn Arngrimsson, a Norwegian chieftain and explorer who is believed to have discovered Greenland around 860 AD.

In the 12th century, Finn Folcvaldsson was a Norwegian Viking who participated in the conquest of Dublin and is mentioned in the Icelandic sagas. Several centuries later, Finn Magnusson (1563-1629) was a prominent Icelandic scholar and writer who played a significant role in preserving the country's literary heritage.

Another notable figure was Finn Vowed, also known as Finn Vordidsen (1609-1670), a Danish astronomer and mathematician who made important contributions to the study of comets and the calculation of planetary orbits.

While the name Fionn has ancient roots and a rich history, it has remained popular throughout the centuries and continues to be used in various forms around the world today.

Sourced from namecensus.com.

Popularity

Fionn over time

The chart below compares boys and girls registered as Fionn in England and Wales, 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 Fionn, the clearest high point is 2022. The latest England and Wales figure is 45 births in 2024, compared with 69 at the peak.

Babies born per year

BoysGirls
017355269199620102024

Decades

Fionn by decade

Decade totals smooth out the yearly jumps and make it easier to see whether Fionn 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 #634 289 5
2010s #812 414 10
2000s #1052 213 10
1990s #996 64 4

Geography

Where Fionn is most common

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

Fionn ranks best in Northern Ireland in the latest published regional snapshot for that area, where it placed #26 in 2024.

Northern Ireland
60
Scotland
11

Across the UK

Fionn in Scotland and Northern Ireland

Scotland (NRS)

#330 in 2024

26 years of NRS records, 202 total registered

Northern Ireland (NISRA)

#26 in 2024

26 years of NISRA records, 1,089 total registered

Related

Names similar to Fionn

FAQ

Fionn: questions and answers

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

In 2024, Fionn was ranked #757 for boys in England and Wales, with 45 births registered.

When was Fionn most popular?

The peak year on record was 2022, with 69 babies registered as Fionn in England and Wales.

What is the meaning and origin of Fionn?

An Irish name meaning fair or light-haired.

How many people are called Fionn in the UK?

A total of 980 babies have been registered as Fionn across the 29 years of ONS England & Wales records shown here, plus 202 more in Scotland and 1,089 in Northern Ireland.

Where is Fionn most common?

In the latest published local rankings, Fionn ranks best in Northern Ireland, where it placed #26 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.