Okai

surname · Latin script

Recorded as a male name· opposite-gender records fall within measured source noise

Okai is a surname written in the Latin script, with more bearers in the United States than in any other country. Recorded meaning: from Ó hAichir, see O’Hare .

rarermore common
  • USUnited States1 in 1.1M(measured from records)
  • NLNetherlands1 in 1.2M
  • BEBelgium1 in 2.9M

carrying the name, as counted by each country's national register. One hue, darker where it is more common; hover a country for its figure.

United States (measured from records)

302 people, 2010

Sources
23 (measured from records)

Highest-authority source

1 in 1.1M (inferred from the name graph)

United States

measured from records inferred from the name graph

Name dossier (print, CSV)

Meaning & origin(measured from records)

from Ó hAichir, see O’Hare . • Current frequencies: GB 159, Ireland 0 • GB frequency 1881: 0 Ghanaian: unexplained.

Sources 1

  • The Oxford Dictionary of Family Names in Britain and Ireland

Attested in 1 language in the etymology graph.

Where in the world(measured from records)

Okai 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.

Where Okai is recorded, by country
CountryMost common spellingSources
US United States3021 in 1.1M440Okai23
BR Brazil261 in 8.1M26Okai18
NL Netherlands141 in 1.2M14—1
ES Spain141 in 3.6M14—2
BE Belgium41 in 2.9M4—1

302 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 2020; IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname); CBG Familienamenbank — Dutch surname bearer counts (GBA/BRP 2007); INE — Padrón per-token widgets (current living counts, given + apellidos); Familienaam.be — Belgian family-name frequency (population 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 names spelled this way(inferred from the name graph)

Okai is also recorded as 2 other names, grouped separately because the records behind them do not connect to the one described above.

  • French surname2 spellings in the group

    Most recorded in France, United Kingdom, Ghana, United States

    Also written Okaï

  • Hindi surname3 spellings in the group

    Most recorded in United States, United Kingdom, India, Ghana

    Languages: Hindi, Urdu

    Also written Òkàï

36 further groups record this spelling and are not listed here.

Grouping is the name graph's, not a register's: two spellings join a group when the evidence links them, so a group is a claim about the records rather than about the people.

Other recorded senses(measured from records)

Okai 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 Hungarian, third-person singular multiple-possession possessive of ok

    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.

Notable people with this name(measured from records)

1850190019502000Okai Tonojo, b. 1866Shōji Okai, b. 1925Takashi Okai, b. 1928Takashi Okai, b. 1947Naomichi Okai, b. 1947Daiji Okai, b. 1953Asako Okai, b. 1966Chisato Okai, b. 1994Asuna Okai, b. 1996

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).

Evidence(measured from records)

Attested in 15 sources across 9 countries.

Official registers attesting Okai
CountryRegisterYearCountRank
US United StatesCensus Bureau — Surname Frequency 20202020440#51,181
US United StatesCensus Bureau — Surname Frequency 20102010302#65,593
US United StatesCensus Bureau — Surname Frequency 20002000186#91,801
BR BrazilIBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname)—26#164,002
ES SpainINE — Padrón per-token widgets (current living counts, given + apellidos)—14#101,339
NL NetherlandsCBG Familienamenbank — Dutch surname bearer counts (GBA/BRP 2007)200714#57,409
BE BelgiumFamilienaam.be — Belgian family-name frequency (population register)20084#112,148
US United Stateswru Name Dictionary — US surnames, Census 2010 subset (Khanna et al.)———

Reference works 3

  • The Oxford Dictionary of Family Names in Britain and Ireland
  • Nederlandse FamilienamenBank (Dutch surname bank; ex-Meertens Instituut, now CBG)2007
  • Wikipedia surname tokens

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

Where does the name Okai come from?
from Ó hAichir, see O’Hare . • Current frequencies: GB 159, Ireland 0 • GB frequency 1881: 0 Ghanaian: unexplained. Recorded by The Oxford Dictionary of Family Names in Britain and Ireland.
What does the name Okai mean?
Recorded meaning: from Ó hAichir, see O’Hare .
In which country does Okai have the most bearers?
In the United States, the national register counted about 302 people named Okai, more than in any other country we hold, where it is most often spelled okai.
Where is Okai most common?
Okai is densest in the United States, where the national register counts about 1 in 1.1 million people carrying it.
How common is the name Okai?
In the United States, the national register counted 302 people named Okai in 2010, about 1 in 1.1 million residents.

What do you want to know about Okai?

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Query this name via API
curl -H "X-API-Key: YOUR_KEY" https://api.mondonomo.ai/api/v1/name-graph/okai

The same 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), 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, “Okai”. Data snapshot 2026-10-10.

See how Okai parses inside a full name →