Oonagh
given name · Latin script
A female name· listed as female by the registers that count names by sex
(measured from records)Officially recorded in 9 countries · latest register: NISRA, 2025
Oonagh is a female given name written in the Latin script, with more bearers in the United Kingdom than in any other country. Recorded meaning: Variant spelling of Oona, Una, Anglicized from Irish Úna.
- IEIreland≈1 in 16Kfew records(inferred from the name graph)
- GBUnited Kingdom≈1 in 91K
- AUAustralia≈1 in 180Kfew records
carrying the name, as counted by its national register where one exists and as Mondonomo estimates it elsewhere (marked ≈ and "est." on hover). Countries with no figure are shown too: flat where a national register lists the name without counting it, hatched where only our records hold it. One hue, darker where it is more common; hover a country for its figure.
- United Kingdom (inferred from the name graph)
- Record sources
- 134 (measured from records)
- ≈1 in 16K (inferred from the name graph)
≈760 people, est.
corpus datasets behind its best-documented spelling
strongest: highest-authority source
Ireland, est.
measured from records inferred from the name graph
Meaning & origin
(measured from records)Variant spelling of Oona, Una, Anglicized from Irish Úna.
Cited for this meaning 2
Attested across 5 languages in the etymology graph.
Often considered alongside
Names that people choosing a name often weigh against Oonagh, most often first. They share a style rather than an origin.
From the names suggested together in public name-advice forums, in English. A list of what people consider, not a measure of how common any name is.
Where in the world
(measured from records)Oonagh counted together with the spellings and other-language forms grouped with it. Where a register counted another spelling, the row names it.
Sorted by bearers: national registers' counts, and Mondonomo's estimates (≈, est.) where no register counts.
| Country | Most common spelling | Sources | ||||
|---|---|---|---|---|---|---|
| GB United Kingdom | — | ≈760 est. | ≈1 in 91K | 3 | Oonagh | 132 |
| IE Ireland | #439 | ≈330 est. | ≈1 in 16K | — | Oonagh | 79 |
| US United States | — | 189 | 1 in 1.8M | 188 | Oonagh | 134 |
| AU Australia | — | ≈150 est. | ≈1 in 179K | 1 | Oonagh | 57 |
| ES Spain | — | ≈53 est. | ≈1 in 920K | — | Oonagh | 15 |
| NZ New Zealand | — | ≈17 est. | ≈1 in 305K | — | Oonagh | 18 |
| BE Belgium | — | ≈16 est. | ≈1 in 722K | — | Oonagh | 6 |
Exact figures are national registers' own counts, while figures marked ≈ and est. are Mondonomo’s estimates, counted from our sources and calibrated against those registers; hover one for how far to trust it in that country. A dash means neither exists.
Registers cited: NISRA — Baby names Northern Ireland full list (1997–present); Census Bureau — First Name Frequency 2020 by sex; SA BDM — Popular baby names South Australia (1944–present). Figures without a register are Mondonomo estimates; see Methodology.
Country figures for a list of names, at full precision, are available under licence rather than by scraping this table (how that works).
Notable people with this name
(measured from records)- Oona O'Neillb. 1925GBnot in their usual nameAmerican-British actress (1925–1991)
- Oona Chaplinb. 1986ESnot in their usual nameSpanish actress
- Oona Laurenceb. 2002USnot in their usual nameAmerican actress
The ten people covered by the most Wikipedia language editions — a proxy for cross-cultural notability, which favours historical and Western figures over equally prominent contemporary ones — shown by birth year. Source: Wikidata (CC0).
How to address them
(machine-generated)A formal English salutation is built on the surname, so it needs a full name — on its own, a first name only supports the informal form.
Evidence
(measured from records)17 registers and reference works attest this spelling, across 9 countries.
Register rows as of the 2026-10-09 data build.
Frequently asked questions
- What does the name Oonagh mean, and where does it come from?
- Variant spelling of Oona, Una, Anglicized from Irish Úna. Recorded by Wiktionary and Nordic Names.
- What are other forms of the name Oonagh?
- In the etymology graph, Oona, Úna and Ùna are forms of the same name in other languages.
- Is Oonagh a male or female name?
- Oonagh is a female name. National registers that list it by sex list it as female: United States (Census Bureau, 2020).
- Which countries have the most people named Oonagh?
- Mondonomo estimates about 759 people named Oonagh in the United Kingdom, more than in any other country we hold, where it is most often spelled oonagh. After it come Ireland, United States, Australia and Spain; the country table on this page ranks them.
- How common is the name Oonagh?
- In the United States, the national register counted 189 people named Oonagh in 2020, about 1 in 1.8 million residents.
- How common is Oonagh compared with other names?
- In Ireland, Oonagh is the 439th most common given name of 14,976 given names recorded there.
What do you want to know about Oonagh?
Nobody replies to these one by one, but what readers ask decides what these pages answer next.
Query this name via API
curl -H "X-API-Key: YOUR_KEY" https://api.mondonomo.ai/api/v1/name-graph/oonaghThe payload this page is built from: spellings and scripts, countries and languages, related names, and the registers that attest the form. It takes a free API key (1,000 requests a day), which returns what this page shows everyone; the full country table, every register citation and the year-by-year series come with a licensed key, as does bulk access.
About this data
measured from records inferred from the name graph machine-generated
These figures come from the data snapshot of and will change as it is rebuilt.
Statistics are aggregated from the Mondonomo name corpus; related names and etymology are inferred from the name graph; pronunciation and any machine-marked transliterations are model-generated. Read how the numbers are made, including their known failure modes, and where the data comes from.
Reference works we consult — surname dictionaries, official name registers, Wikidata and Wiktionary — are named directly, beside the claims they support. The per-country source counts also include datasets of person records: we publish how many there are and their authority tier, but not their names.
Cite this page Mondonomo, “Oonagh” — ranked 407th in the United Kingdom (NISRA). Data snapshot 2026-10-13.