UK girl's name
Oonagh
Ancient Irish feminine name possibly meaning "pure" or "lamb".
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.
Oonagh is a girl's name in the UK records. People looking for Oonagh popularity in 2026 should use the latest official release, which is 2024 in this profile. In that release it ranked #2115, with 13 babies registered with the name. Its strongest year in the published records was 2022, with 16 births.
This profile covers 246 England and Wales registrations across 28 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 81% of the recorded peak, which gives a quick read on how the name has moved since its high point.
We estimate that about 391 living people in the UK are called Oonagh. 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
- • Oonagh ranked #2115 for girls in England and Wales in 2024, with 13 registrations.
- • The name peaked in 2022, when 16 girls were registered as Oonagh.
- • Oonagh ranks best in Northern Ireland in the latest published regional snapshot for that area, where it placed #407 in 2024.
- • About 391 living people in the UK are estimated to have Oonagh as a first name, after adjusting past birth registrations with ONS life tables.
Latest rank (E&W)
#2115
2024
Births in 2024
13
Latest year
Peak year
2022
16 births
Estimated living
391
2026
Meaning
What does Oonagh mean?
Oonagh is a feminine given name with Irish Gaelic origins, derived from the ancient Irish word "uan" meaning "lamb." The name was initially popular in Ireland and parts of Scotland during the Middle Ages, particularly among Celtic communities.
The earliest known usage of Oonagh can be traced back to the 8th century, where it appeared in various Irish annals and historical records. Some scholars believe the name may have been inspired by the Irish goddess Onu, who was associated with fertility and abundance.
In the 12th century, the name Oonagh gained prominence with the birth of Oonagh Ní Chearnaigh, the daughter of a prominent Irish chieftain. She was known for her beauty and was celebrated in several medieval Irish poems and songs.
Another notable figure bearing the name Oonagh was Oonagh Bán, a 16th-century Irish noblewoman and landowner from County Sligo. She was renowned for her hospitality and generosity towards the poor and travelers.
In the 17th century, Oonagh O'Donnell, a member of the powerful O'Donnell clan, played a significant role in the Irish Confederate Wars, serving as a messenger and advisor to the Irish Confederate leaders.
During the 18th century, Oonagh O'Brien, an Irish poet and storyteller, gained recognition for her captivating tales and verses that celebrated Irish culture and traditions.
Oonagh Khin, born in 1923, was a Burmese diplomat and the first female ambassador from Myanmar to the United Nations. She played a crucial role in advocating for her country's independence and promoting women's rights on the international stage.
While the name Oonagh has its roots in ancient Ireland, it has also been adopted and used in various parts of the world, particularly among Irish diasporic communities. The name's enduring appeal lies in its unique sound, Celtic heritage, and connection to the natural world through its meaning of "lamb."
Sourced from namecensus.com.
Popularity
Oonagh over time
The chart below shows babies named Oonagh 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 Oonagh, the clearest high point is 2022. The latest England and Wales figure is 13 births in 2024, compared with 16 at the peak.
Babies born per year
Decades
Oonagh by decade
Decade totals smooth out the yearly jumps and make it easier to see whether Oonagh 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 | #2261 | 61 | 5 |
| 2010s | #2876 | 89 | 10 |
| 2000s | #2808 | 66 | 9 |
| 1990s | #2049 | 30 | 4 |
Geography
Where Oonagh is most common
The bars show the latest published local birth counts for Oonagh. 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.
Oonagh ranks best in Northern Ireland in the latest published regional snapshot for that area, where it placed #407 in 2024.
Across the UK
Oonagh in Scotland and Northern Ireland
Scotland (NRS)
#749 in 2023
11 years of NRS records, 42 total registered
Northern Ireland (NISRA)
#407 in 2024
21 years of NISRA records, 105 total registered
Notable bearers
Famous people named Oonagh
-
Oonagh Stewart
association football player
1995-
-
Oonagh Aitken
teacher; treasurer; chief executive officer
British chief executive
1956-
-
Oonagh McDonald
politician; university teacher; financial adviser
British politician (born 1938)
1938-
Related
Names similar to Oonagh
- Olivia 123,111
- Orla 10,799
- Olive 6,815
- Ophelia 4,939
- Ottilie 4,407
- Oliwia 2,608
- Ocean 1,811
- Orlaith 1,357
- Olivia-Rose 1,250
- Octavia 1,243
- Olivia-Grace 618
- Orlagh 608
FAQ
Oonagh: questions and answers
How popular is the name Oonagh in the UK right now?
In 2024, Oonagh was ranked #2115 for girls in England and Wales, with 13 births registered.
When was Oonagh most popular?
The peak year on record was 2022, with 16 babies registered as Oonagh in England and Wales.
What is the meaning and origin of Oonagh?
Ancient Irish feminine name possibly meaning "pure" or "lamb".
How many people are called Oonagh in the UK?
A total of 246 babies have been registered as Oonagh across the 28 years of ONS England & Wales records shown here, plus 42 more in Scotland and 105 in Northern Ireland.
Where is Oonagh most common?
In the latest published local rankings, Oonagh ranks best in Northern Ireland, where it placed #407 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.