O'Day
surname · Latin script
Recorded for both men and women· direction only, no split published
/oʊˈdeɪ/(machine-generated) pronunciation, model-generated
O'Day is a surname written in the Latin script, with more bearers in the United States than in any other country. Recorded meaning: Borrowed from Arabic عدي (Udai).
- USUnited States1 in 90K(measured from records)
- GBUnited Kingdom≈1 in 104K
- PHPhilippines≈1 in 125K
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
- 253 (measured from records)
- ≈1 in 65K (inferred from the name graph)
3,688 people, 2010
Highest-authority source
Iceland, 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 Oday in US United States, GB United Kingdom, PH Philippines and 3 more.
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)
Borrowed from Arabic عدي (Udai).
Sources 1
Attested in 1 language in the etymology graph.
Where in the world(measured from records)
O'Day 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 | 3,688 | 1 in 90K | 3.7K | Oday | 253 |
| PH Philippines | ≈870 est. | ≈1 in 125K | — | Oday | 19 |
| GB United Kingdom | ≈630 est. | ≈1 in 104K | 179 | Oday | 50 |
| CA Canada | ≈290 est. | ≈1 in 132K | 1 | Oday | 49 |
| IT Italy | ≈260 est. | ≈1 in 238K | 3 | Oday | 1 |
| IE Ireland | ≈75 est. | ≈1 in 69K | — | Oday | 5 |
| EE Estonia | ≈14 est. | ≈1 in 88K | listed | — | 1 |
| IS Iceland | ≈5 est. | ≈1 in 65K | 5 | — | — |
3,688 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; Census Bureau — Surname Frequency 2000; Surnames of England and Wales (taliesin-arlein.net, Sept 2002 electoral register); Alberta Open Government — Frequency and Ranking of Baby Names by Year and Gender; ISTAT — Contanomi newborn per-name series (1999–2024, JSONP backend); Þjóðskrá Íslands — Name frequencies (NafnTíðni, registry). 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)
- Hank O'Dayb. 1859USnot in their usual nameAmerican baseball player, manager, umpire (1859–1935)
- Caroline Love Goodwinb. 1875USnot in their usual nameAmerican politician (1875-1943)
- Marcus O'Dayb. 1897USnot in their usual nameAmerican physicist
- Peggy O'Dayb. 1900USnot in their usual nameactress (1900-1964)
- Nell O'Dayb. 1909USnot in their usual nameactress (1909-1989)
- Molly O'Dayb. 1911USnot in their usual nameAmerican actress (1909–1998)
- Anita O'Dayb. 1919USnot in their usual nameAmerican jazz singer (1919–2006)
- Alan O'Dayb. 1940USnot in their usual nameAmerican male singer-songwriter (1940-2013)
- Darren O'Dayb. 1982USnot in their usual nameAmerican college baseball player, professional baseball player, pitcher
- Aubrey O'Dayb. 1984USnot in their usual nameAmerican singer and reality television personality
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 5 sources across 4 countries.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| GB United Kingdom | Surnames of England and Wales (taliesin-arlein.net, Sept 2002 electoral register) | 2002 | 179 | #22,902 |
| US United States | wru Name Dictionary — US surnames, voter-file supplement (Khanna et al.) | — | — | — |
Reference works 1
- Nederlandse FamilienamenBank (Dutch surname bank; ex-Meertens Instituut, now CBG)2007
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'Day mean, and where does it come from?
- Borrowed from Arabic عدي (Udai). Recorded by Wiktionary.
- How do you pronounce O'Day?
- A machine transcription gives /oʊˈdeɪ/ (IPA) for English.
- In which country does O'Day have the most bearers?
- In the United States, the national register counted about 3.7 thousand people named O'Day, more than in any other country we hold, where it is most often spelled oday.
- How common is the name O'Day?
- In the United States, the national register counted 3,688 people named O'Day in 2010, about 1 in 90 thousand residents.
What do you want to know about O'Day?
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'dayThe 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'Day”. Data snapshot 2026-10-10.