UK boy's name
Tiernan
An Irish masculine name derived from "tir na noibh" meaning "lord of the territory".
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.
Tiernan is a boy's name in the UK records. People looking for Tiernan popularity in 2026 should use the latest official release, which is 2024 in this profile. In that release it ranked #2921, with 7 babies registered with the name. Its strongest year in the published records was 1999, with 24 births.
This profile covers 377 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 29% of the recorded peak, which gives a quick read on how the name has moved since its high point.
We estimate that about 1,389 living people in the UK are called Tiernan. 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
- • Tiernan ranked #2921 for boys in England and Wales in 2024, with 7 registrations.
- • The name peaked in 1999, when 24 boys were registered as Tiernan.
- • Tiernan ranks best in Northern Ireland in the latest published regional snapshot for that area, where it placed #125 in 2024.
- • About 1,389 living people in the UK are estimated to have Tiernan as a first name, after adjusting past birth registrations with ONS life tables.
Latest rank (E&W)
#2921
2024
Births in 2024
7
Latest year
Peak year
1999
24 births
Estimated living
1,389
2026
Meaning
What does Tiernan mean?
The name Tiernan is an Irish given name of Gaelic origin, derived from the Irish word "tíreannach," which means "lord" or "landowner." The name dates back to the early medieval period in Ireland, around the 5th to 8th centuries CE.
Tiernan was a popular name among the Irish nobility and ruling classes during this time. It was often given to the sons of chieftains and kings, reflecting their status as lords of the land. The name's roots can be traced back to the Old Irish language, which was spoken in Ireland before the arrival of Christianity.
One of the earliest recorded instances of the name Tiernan is found in the Annals of Ulster, a chronicle of medieval Irish history. In this text, a person named Tiernan Ua Ruairc is mentioned as the King of Breifne, a medieval kingdom in what is now County Leitrim, Ireland, in the late 12th century.
Throughout the centuries, several notable individuals bore the name Tiernan. One of the most famous was Tiernan O'Rourke (c. 1625-1718), an Irish poet and harpist who was renowned for his compositions in the Gaelic tradition. Another notable Tiernan was Tiernan O'Donnell (c. 1570-1649), a Irish chieftain and military leader who fought against the English during the Irish Confederate Wars.
In the 19th century, Tiernan was the given name of Tiernan O'Farrelly (1826-1892), an Irish-American businessman and philanthropist who founded the O'Farrelly School for Boys in New York City. Additionally, Tiernan MacBride (1856-1923) was an Irish barrister and Home Rule politician who served as Lord Mayor of Dublin.
Tiernan O'Rourke (1876-1957) was an Irish Sinn Féin politician and member of the First Dáil Éireann, the revolutionary parliament of the Irish Republic established in 1919. He was a prominent figure in the Irish struggle for independence from British rule.
While the name Tiernan has its roots in ancient Irish history, it continues to be used as a given name in modern times, particularly in Ireland and among Irish diaspora communities around the world.
Sourced from namecensus.com.
Popularity
Tiernan over time
The chart below shows babies named Tiernan 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 Tiernan, the clearest high point is 1999. The latest England and Wales figure is 7 births in 2024, compared with 24 at the peak.
Babies born per year
Decades
Tiernan by decade
Decade totals smooth out the yearly jumps and make it easier to see whether Tiernan 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 | #2262 | 58 | 5 |
| 2010s | #2105 | 111 | 10 |
| 2000s | #1260 | 156 | 10 |
| 1990s | #1201 | 52 | 4 |
Geography
Where Tiernan is most common
The bars show the latest published local birth counts for Tiernan. 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.
Tiernan ranks best in Northern Ireland in the latest published regional snapshot for that area, where it placed #125 in 2024.
Across the UK
Tiernan in Scotland and Northern Ireland
Scotland (NRS)
#619 in 2024
10 years of NRS records, 44 total registered
Northern Ireland (NISRA)
#125 in 2024
28 years of NISRA records, 979 total registered
Notable bearers
Famous people named Tiernan
-
Tiernan Brooks
association football player
Irish-English footballer (born 2002)
2003-
Related
Names similar to Tiernan
- Thomas 160,894
- Tyler 42,147
- Theo 40,594
- Toby 32,482
- Theodore 30,211
- Tommy 25,300
- Teddy 20,781
- Taylor 14,354
- Tobias 13,102
- Tom 9,822
- Tristan 9,171
- Timothy 6,200
FAQ
Tiernan: questions and answers
How popular is the name Tiernan in the UK right now?
In 2024, Tiernan was ranked #2921 for boys in England and Wales, with 7 births registered.
When was Tiernan most popular?
The peak year on record was 1999, with 24 babies registered as Tiernan in England and Wales.
What is the meaning and origin of Tiernan?
An Irish masculine name derived from "tir na noibh" meaning "lord of the territory".
How many people are called Tiernan in the UK?
A total of 377 babies have been registered as Tiernan across the 29 years of ONS England & Wales records shown here, plus 44 more in Scotland and 979 in Northern Ireland.
Where is Tiernan most common?
In the latest published local rankings, Tiernan ranks best in Northern Ireland, where it placed #125 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.