O'Hagan
surname · Latin script
Meaning: Descendant of Hagan
Recorded as a male name· opposite-gender records fall within measured source noise
/oʊˈhɑɡɑn/(machine-generated) pronunciation, model-generated
O'Hagan is a surname written in the Latin script, with more bearers in the United States than in any other country.
- IEIreland≈1 in 33K(inferred from the name graph)
- AUAustralia≈1 in 72K
- GBUnited Kingdom≈1 in 72K
carrying the name, as counted by its national register where one exists and as Mondonomo estimates it elsewhere (marked ≈ and "est." on hover). One hue, darker where it is more common; hover a country for its figure.
- United States (measured from records)
- Sources
- 219 (measured from records)
- ≈1 in 33K (inferred from the name graph)
1,998 people, 2010
Highest-authority source
Ireland, est.
measured from records inferred from the name graph
Spellings & scripts(measured from records)
One other spelling is counted as the same name:
Locally spelled Ohagan in US United States, PH Philippines.
Spellings marked ● are how people bearing the name write it in our records, and ○ marks a model's transliteration; click a spelling to open its page.
Meaning & origin(measured from records)
Descendant of Hagan.
Sources 1
- Encyclopedia of surnames [the complete companion to tracing your names history]
Where in the world(measured from records)
O'Hagan 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 | ||||
|---|---|---|---|---|---|---|
| US United States | — | 1,998 | 1 in 166K | 2K | Ohagan | 219 |
| GB United Kingdom | — | ≈910 est. | ≈1 in 72K | 2.2K | O'Hagan | 121 |
| PH Philippines | — | ≈530 est. | ≈1 in 205K | — | Ohagan | 15 |
| AU Australia | — | ≈350 est. | ≈1 in 72K | — | O'Hagan | 75 |
| CA Canada | — | ≈190 est. | ≈1 in 196K | — | O'Hagan | 75 |
| IE Ireland | #512 | ≈160 est. | ≈1 in 33K | — | O'Hagan | 57 |
| NZ New Zealand | — | ≈95 est. | ≈1 in 52K | — | O'Hagan | 41 |
1,998 people counted by Census Bureau — Surname Frequency 2010, 2010. 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: Census Bureau — Surname Frequency 2010; Surnames of England and Wales (taliesin-arlein.net, Sept 2002 electoral register). 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).
Other recorded senses(measured from records)
O'Hagan is also recorded in one other lexicon, as a different name or as an ordinary word. These are senses of the spelling, not of the name above.
In English, O hAodhagain ‘young’; Tyrone
as a nameIrish family names
Ordered by how much of this spelling's record each language holds, so a sense from a language the name is barely used in sits last rather than first.
Notable people with this name(measured from records)
- Thomas O’Hagan, 1st Baron O’Haganb. 1812GBnot in their usual nameIrish lawyer and judge (1812-1885)
- John O'Haganb. 1822GBnot in their usual nameIrish judge, lawyer, writer and nationalist
- Anne O'Haganb. 1869USnot in their usual nameAmerican journalist
- Charles O'Haganb. 1881IEnot in their usual nameEnglish footballer (1881-1931)
- Joan O'Haganb. 1926not in their usual nameAustralian writer (1926−2014)
- Colo Tavernierb. 1942GBnot in their usual nameBritish-French screenwriter (1942–2020)
- Martin O'Haganb. 1950GBnot in their usual nameIrish investigative journalist
- Sean O'Haganb. 1953GBnot in their usual nameNorthern Irish music and photography journalist
- Andrew O'Haganb. 1968GBnot in their usual nameScottish novelist, journalist, academic (born 1968)
- Katie O'Haganb. 1982USnot 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)
Evidence(measured from records)
Attested in 11 sources across 7 countries.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| GB United Kingdom | Surnames of England and Wales (taliesin-arlein.net, Sept 2002 electoral register) | 2002 | 2.2K | #3,450 |
| US United States | wru Name Dictionary — US surnames, voter-file supplement (Khanna et al.) | — | — | — |
Reference works 3
- Nederlandse FamilienamenBank (Dutch surname bank; ex-Meertens Instituut, now CBG)2007
- Wikipedia surname tokens
- Wikidata name items (native-script + romanized given/family names)
These works list the name; their figures are licensed and are not reproduced here.
Register rows as of the 2026-10-09 data build.
Frequently asked questions
- What does the name O'Hagan mean, and where does it come from?
- Descendant of Hagan. Recorded by Encyclopedia of surnames [the complete companion to tracing your names history].
- How do you pronounce O'Hagan?
- A machine transcription gives /oʊˈhɑɡɑn/ (IPA) for English.
- In which country does O'Hagan have the most bearers?
- In the United States, the national register counted about 2.0 thousand people named O'Hagan, more than in any other country we hold, where it is most often spelled ohagan.
- How common is the name O'Hagan?
- In the United States, the national register counted 1,998 people named O'Hagan in 2010, about 1 in 166 thousand residents.
- How common is O'Hagan compared with other names?
- In Ireland, O'Hagan is the 512th most common surname of 73,729 surnames recorded there.
What do you want to know about O'Hagan?
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/o'haganThe 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, “O'Hagan” — the 512th most common surname in Ireland. Data snapshot 2026-10-10.