Casey
given name · Latin script
Meaning: From Irish Gaelic Ó Cathasaigh, 'descendant of Cathasach', a nickname meaning 'vigilant' or 'noisy'
Recorded for both men and women· direction only, no split published
/keɪsi/(machine-generated) pronunciation, model-generated
Casey is a given name written in the Latin script, with more bearers in China than in any other country.
- USUnited States1 in 2K(measured from records)
- AUAustralia≈1 in 2.4K
- NZNew Zealand≈1 in 3.8K
carrying the name, as counted by its national register where one exists and as Mondonomo estimates it elsewhere (marked ≈ and "est." on hover). Where a country counts another spelling of the name rather than Casey itself, the figure is that spelling’s, and it is named. One hue, darker where it is more common; hover a country for its figure.
- China (inferred from the name graph)
- 3 (measured from records)
- Sources
- 586 (measured from records)
- 1 in 2.0K (inferred from the name graph)
≈190,000 people, est.
recorded for this name
Highest-authority source
United States
measured from records inferred from the name graph
Spellings & scripts(measured from records)
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)
From Irish Gaelic Ó Cathasaigh, 'descendant of Cathasach', a nickname meaning 'vigilant' or 'noisy'.
Sources 1
- Encyclopedia of surnames [the complete companion to tracing your names history]
Attested in 1 language in the etymology graph.
Where in the world(measured from records)
Casey 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 | ||||
|---|---|---|---|---|---|---|
| CN China | — | ≈190,000 est. | ≈1 in 7.2K | — | Casey | 39 |
| US United States | #393 | 165,300 | 1 in 2K | 95K | Casey | 586 |
| GB United Kingdom | #592 | ≈10,000 est. | ≈1 in 6.3K | 33 | Casey | 254 |
| AU Australia | #355 | ≈10,000 est. | ≈1 in 2.4K | 80 | Casey | 213 |
| CA Canada | #508 | ≈8,300 est. | ≈1 in 4.5K | 39 | Casey | 233 |
| AL Albania | — | 2,252as Kejsi | 1 in 1.4K | 2.2K | Casey | 13 |
| NZ New Zealand | #340 | ≈1,300 est. | ≈1 in 3.8K | 20 | Casey | 115 |
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 — First Name Frequency 2020 by sex; NSW BDM — Popular baby names (1952–present); NRS — Baby names Scotland full list (1974–present); Alberta Open Government — Frequency and Ranking of Baby Names by Year and Gender; DIA — Baby name popularity (1900–present); INSTAT Albania — Search the name (given-name counts). 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)
Casey is also recorded in 5 other lexicons, as a different name or as an ordinary word. These are senses of the spelling, not of the name above.
In English, from Kersey Marsh in South Benfleet, Essex; also in Ireland for O’Casey, Ir Ó Cathasaigh, from cathasach ‘watchful’; first attested John Casey 1524
as a nameA Dictionary of English Surnames
,9 Especially North American: bestowed originally in honour of the American engine driver and folk hero ‘Casey’ Jones (1863-1900), who saved the lives of passengers on the ‘Cannonball Express’ at the expense of his own. He was baptized Johnathan Luther Jones in Cayce, Kentucky, and acquired his nickname from his birthplace. As a girl’s name it is a variant of Cassie. Variant: Casy.
as a nameA concise dictionary of first names
‘descendant of Cathasacli', a byname meaning ‘Vigilant’ or ‘Noisy’. Carvill i. English and Irish (Norman): habitation name from Casement Manx: Anglicized Easmuimr, see Osmond. in Calvados and Seine-Maritime called Carville, from the Scandinavian personal name Kare + OF ViLLE settlement. 2. Irish: var. of Carroll. Vars.: Carville, Carvell.
as a nameThe Oxford Names Companion - The definitive guide to Surnames, First Names, and Place Names of the British Isles
cendant of Cathasach’, a byname meaning ‘Vigilant’ or ‘Noisy’. Var.: O’Casey.
as a nameA dictionary of surnames
Bravo, agresivo, guerrero
as a name25,000 nombres de bebé. La mejor guía para escoger el nombre adecuado
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)
- Casey Jonesb. 1863USAmerican railroad engineer (1863–1900)
- Casey Stengelb. 1890USAmerican baseball player, coach, and manager (1890–1975)
- Casey Robinsonb. 1903USAmerican film director, film producer and screenwriter (1903–1979)
- Casey Sanderb. 1956USAmerican actor
- Casey Siemaszkob. 1961USAmerican actor
- Casey Affleckb. 1975USAmerican actor
- Casey Wilsonb. 1980USAmerican actress and comedian
- Casey Neistatb. 1981USAmerican YouTube personality, filmmaker and entrepreneur
- Casey Stonerb. 1985AUAustralian former motorcycle racer
- XXXTENTACIONb. 1998USnot in their usual nameAmerican rapper (1998–2018)
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)
Attested in 75 sources across 38 countries.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| US United States | Census Bureau — Surname Frequency 2010 | 2010 | 67K | #504 |
| US United States | Census Bureau — Surname Frequency 2000 | 2000 | 65K | #463 |
| US United States | Census Bureau — Surname Frequency 2020 | 2020 | 63K | #519 |
Reference works 5
- The Oxford Dictionary of Family Names in Britain and Ireland
- Nederlandse FamilienamenBank (Dutch surname bank; ex-Meertens Instituut, now CBG)2007
- Wikipedia given-name tokens
- 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
- Is Casey a male or female name?
- Casey is recorded for both men and women. We don't publish a percentage split: a record's gender belongs to the person and is attached to every given name on that record, so names in cultures where a name string also carries a parent's or spouse's given name pick up large cross-gender counts.
- What does the name Casey mean, and where does it come from?
- From Irish Gaelic Ó Cathasaigh, 'descendant of Cathasach', a nickname meaning 'vigilant' or 'noisy'. Recorded by Encyclopedia of surnames [the complete companion to tracing your names history].
- How common is the name Casey?
- In the United States, the national register counted 165,300 people named Casey in 2020, about 1 in 2.0 thousand residents.
- How common is Casey compared with other names?
- In New Zealand, Casey is the 340th most common given name of 26,737 given names recorded there.
- What are other forms of the name Casey?
- In the etymology graph, Kasey, Kayce and Kejsi are forms of the same name in other languages.
- In which country does Casey have the most bearers?
- Mondonomo estimates about 193 thousand people named Casey in China, more than in any other country we hold, where it is most often spelled casey.
- Where is Casey most common?
- Measured as a share of residents rather than as a count, Casey is densest in the United States — about 1 in 2.0 thousand people — even though China holds more of our records for it.
- How do you pronounce Casey?
- A machine transcription gives /keɪsi/ (IPA) for English.
What do you want to know about Casey?
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/caseyThe 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, “Casey” — the 340th most common given name in New Zealand. Data snapshot 2026-10-10.