Oí
surname · Latin script
Recorded for both men and women· direction only, no split published
Oí is a surname written in the Latin script, with more bearers in the United States than in any other country.
- SESweden1 in 237K(measured from records)
- ISIceland1 in 351K
- NLNetherlands1 in 508K
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
- 55 (measured from records)
- 1 in 237K (inferred from the name graph)
574 people, 2020
Highest-authority source
Sweden
measured from records inferred from the name graph
Spellings & scripts(measured from records)
One other spelling is counted as the same name:
Locally spelled Oi in US United States, CO Colombia.
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
No verified etymology recorded for this name yet — the entries below are drawn from usage statistics and the name graph.
Attested across 19 languages in the etymology graph.
Where in the world(measured from records)
Oí 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 | 574 | 1 in 580K | 504 | Oi | 29 |
| SE Sweden | 43 | 1 in 237K | 43 | — | 1 |
| NL Netherlands | 34 | 1 in 508K | 34 | — | 2 |
| DK Denmark | 11 | 1 in 534K | 11 | — | — |
| CO Colombia | ≈5 est. | ≈1 in 9.4M | — | Oi | 6 |
| IS Iceland | 1 | 1 in 351K | 1 | — | — |
574 people counted by Census Bureau — First Name Frequency 2020 by sex, 2020. 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; Skatteverket — Sök hur många som har ett visst namn (living population); Meertens NVB — Nederlandse Voornamenbank (all-time BRP bearer counts, 2018); Danmarks Statistik — Hvor mange hedder...? (living-population name counts); 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).
Other recorded senses(measured from records)
Oí is also recorded in 3 other lexicons, as a different name or as an ordinary word. These are senses of the spelling, not of the name above.
In Catalan, first/third-person singular preterite indicative of oir
as a wordkaikki.org Wiktionary extract (IPA + transliterations)
In ntp, palm tree
as a wordkaikki.org Wiktionary extract (IPA + transliterations)
In sga, sheep
as a wordkaikki.org Wiktionary extract (IPA + transliterations)
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.
Evidence(measured from records)
No register attests this spelling yet
Frequently asked questions
- In which country does Oí have the most bearers?
- In the United States, the national register counted about 574 people named Oí, more than in any other country we hold, where it is most often spelled oi.
- Where is Oí most common?
- Measured as a share of residents rather than as a count, Oí is densest in Sweden — about 1 in 237 thousand people — even though United States holds more of our records for it.
- How common is the name Oí?
- In the United States, the national register counted 574 people named Oí in 2020, about 1 in 580 thousand residents.
What do you want to know about Oí?
Nobody replies to these one by one, but what readers ask decides what these pages answer next.
Query this name via API
curl https://api.mondonomo.ai/api/v1/name-graph/o%C3%ADThe same payload this page is built from: spellings and scripts, countries and languages, related names, and the registers that attest the form. Rate-limited for casual use; a free API key gives 1,000 requests a day, and bulk access is licensed separately.
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, “Oí”. Data snapshot 2026-10-10.