UK boy's name
Kiernan
A masculine name of Gaelic origin meaning "son of the little dark one".
For 2026, the newest official UK baby-name figures on this page are from 2023. That release is the current official benchmark rather than a forecast.
Kiernan is a boy's name in the UK records. People looking for Kiernan popularity in 2026 should use the latest official release, which is 2023 in this profile. In that release it ranked #4107, with 4 babies registered with the name. Its strongest year in the published records was 2004, with 8 births.
This profile covers 64 England and Wales registrations across 14 recorded years from 1997 to 2023. 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.
The latest count is about 50% of the recorded peak, which gives a quick read on how the name has moved since its high point.
We estimate that about 73 living people in the UK are called Kiernan. 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 2024 or 2026.
Key insights
- • Kiernan ranked #4107 for boys in England and Wales in 2023, with 4 registrations.
- • The name peaked in 2004, when 8 boys were registered as Kiernan.
- • Kiernan ranks best in Northern Ireland in the latest published regional snapshot for that area, where it placed #378 in 2008.
- • About 73 living people in the UK are estimated to have Kiernan as a first name, after adjusting past birth registrations with ONS life tables.
Latest rank (E&W)
#4107
2023
Births in 2023
4
Latest year
Peak year
2004
8 births
Estimated living
73
2026
Meaning
What does Kiernan mean?
The name Kiernan is an Irish name derived from the Gaelic word "ciar," meaning "black" or "dark." It was originally a surname that evolved from the Irish Gaelic name "Ó Ciardhubháin," meaning "descendant of the dark one." The name has been in use since at least the 8th century in Ireland and has its roots in the ancient Celtic culture.
One of the earliest recorded instances of the name Kiernan can be found in the Annals of Ulster, a chronicle of medieval Irish history written by monks in the late 15th century. The annals mention a Kiernan Ua Cuinn, who was the lord of Ive-Bairrche (a territory in present-day County Carlow, Ireland) in the year 1045.
In the 12th century, a notable figure named Kiernan O'Rourke was the Bishop of Ardagh, a diocese in County Longford, Ireland. He played a significant role in the ecclesiastical affairs of the region during his tenure from 1184 to 1214.
During the 16th century, Kiernan O'Ruairc was a prominent Irish chieftain and leader of the O'Rourke clan in County Leitrim, Ireland. He is mentioned in several historical accounts for his involvement in the Nine Years' War (1593-1603), a conflict between the Irish chiefs and the English forces of Queen Elizabeth I.
Another notable figure in history with the name Kiernan was Kiernan Dempsey, an Irish soldier who fought in the American Revolutionary War. Born in Dublin in 1753, he served as a lieutenant in the Continental Army and participated in several key battles, including the Battle of Germantown in 1777.
In the 19th century, Kiernan Fitzpatrick was a prominent Irish nationalist and Member of Parliament for County Louth in the United Kingdom of Great Britain and Ireland. He was an advocate for Irish Home Rule and played an active role in the Irish Parliamentary Party during the late 1800s.
While the name Kiernan has its roots in Ireland, it has also been adopted by other cultures and regions over time, although its origins can be traced back to the ancient Gaelic language and Celtic heritage.
Sourced from namecensus.com.
Popularity
Kiernan over time
The chart below shows babies named Kiernan registered in England and Wales in the years where the name appears in the published records, from 1997 to 2023. Empty years are left out so rare names are not stretched across long periods where the published files do not show any registrations.
For Kiernan, the clearest high point is 2004. The latest England and Wales figure is 4 births in 2023, compared with 8 at the peak.
Babies born per year
Decades
Kiernan by decade
Decade totals smooth out the yearly jumps and make it easier to see whether Kiernan 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 | #4107 | 4 | 1 |
| 2010s | #4805 | 3 | 1 |
| 2000s | #2874 | 44 | 9 |
| 1990s | #2368 | 13 | 3 |
Geography
Where Kiernan is most common
The bars show the latest published local birth counts for Kiernan. 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.
Kiernan ranks best in Northern Ireland in the latest published regional snapshot for that area, where it placed #378 in 2008.
Across the UK
Kiernan in Scotland and Northern Ireland
Northern Ireland (NISRA)
#378 in 2008
3 years of NISRA records, 10 total registered
Notable bearers
Famous people named Kiernan
-
Kiernan Kelly
serial killer
British serial killer (1930-2001)
1930-2001
Related
Names similar to Kiernan
- Kieran 30,429
- Kyle 28,463
- Kai 24,432
- Kian 17,666
- Kayden 8,305
- Kevin 7,927
- Kane 7,149
- Kaiden 5,762
- Kieron 4,547
- Kacper 4,366
- Kye 4,012
- Kit 3,529
FAQ
Kiernan: questions and answers
How popular is the name Kiernan in the UK right now?
In 2023, Kiernan was ranked #4107 for boys in England and Wales, with 4 births registered.
When was Kiernan most popular?
The peak year on record was 2004, with 8 babies registered as Kiernan in England and Wales.
What is the meaning and origin of Kiernan?
A masculine name of Gaelic origin meaning "son of the little dark one".
How many people are called Kiernan in the UK?
A total of 64 babies have been registered as Kiernan across the 14 years of ONS England & Wales records shown here and 10 in Northern Ireland.
Where is Kiernan most common?
In the latest published local rankings, Kiernan ranks best in Northern Ireland, where it placed #378 in 2008. 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.