OnOn

surname · Latin script

Recorded for both men and women· direction only, no split published

OnOn is a surname written in the Latin script, with more bearers in Nigeria than in any other country.

rarermore common
  • HKHong Kong≈1 in 169K(inferred from the name graph)
  • PHPhilippines≈1 in 1.2M
  • NGNigeria≈1 in 1.4M

carrying the name, as Mondonomo estimates it from our sources: no national register counts it in these countries. One hue, darker where it is more common; hover a country for its figure.

Nigeria (inferred from the name graph)

≈160 people, est.

Sources
35 (measured from records)

Highest-authority source

≈1 in 169K (inferred from the name graph)

Hong Kong, est.

measured from records inferred from the name graph

Name dossier (print, CSV)

Meaning & origin

No verified etymology recorded for this name yet — the entries below are drawn from usage statistics and the name graph.

Attested in 1 language in the etymology graph.

Where in the world(measured from records)

OnOn 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 OnOn is recorded, by country
CountryMost common spellingSources
NG Nigeria≈160 est.≈1 in 1.4M—OnOn13
PH Philippines≈91 est.≈1 in 1.2M—OnOn12
HK Hong Kong≈43 est.≈1 in 169K—OnOn5
US United States≈22 est.≈1 in 15M—OnOn35
MY Malaysia≈11 est.≈1 in 2.9M—OnOn5
GB United Kingdom≈9 est.≈1 in 7.7M5OnOn12

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: 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 names spelled this way(inferred from the name graph)

OnOn is also recorded as 4 other names, grouped separately because the records behind them do not connect to the one described above.

  • Spanish surname5 spellings in the group

    Most recorded in Philippines, United States

    Languages: Spanish, Portuguese

    Also written Oñon, Ounon

  • Thai surname3 spellings in the group

    Most recorded in Thailand

    Also written On-On

  • Mongolian surname2 spellings in the group

    Most recorded in Mongolia

    Also written Онон

  • Arabic surname4 spellings in the group

    Most recorded in Egypt, Saudi Arabia

    Also written Ônôn, Ònòn

29 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)

OnOn is also recorded in 2 other lexicons, as a different name or as an ordinary word. These are senses of the spelling, not of the name above.

  • In ff, second person plural;emphatic you

    as a wordkaikki.org Wiktionary extract (IPA + transliterations)

  • In Basque, Caramelo. Atsekabeari gain behera, nasaiki, atseginaren asukre herrauts emanez ere, haurrentzateko on-on edo goxoak aphaint zaitezkela . Prop 1911, 14. (ap. DRA ) [Etxea] lehen [...] banko bat zen [...]; orai onon-saltegi bat . Iratz ( in Alzola Atalak 119 ) .

    as a wordOrotariko Euskal Hiztegia (OEH) — General/Historical Basque Dictionary, Euskaltzaindia

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)

Attested in 3 sources across 2 countries.

Official registers attesting OnOn
CountryRegisterYearCountRank
GB United KingdomSurnames of England and Wales (taliesin-arlein.net, Sept 2002 electoral register)20025#230,412

Register rows as of the 2026-10-09 data build.

Frequently asked questions

In which country does OnOn have the most bearers?
Mondonomo estimates about 156 people named OnOn in Nigeria, more than in any other country we hold, where it is most often spelled OnOn.
How common is the name OnOn?
Mondonomo estimates about 160 people in Nigeria have OnOn as their first surname, about 1 in 1.4 million residents. No national register counts it there; the figure is ours, calibrated against the registers that do.

What do you want to know about OnOn?

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

The 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, “OnOn”. Data snapshot 2026-10-10.

See how OnOn parses inside a full name →