Onchai
surname · Latin script
Recorded for both men and women· direction only, no split published
Onchai is a surname written in the Latin script, with more bearers in Thailand than in any other country.
- THThailand≈1 in 13Kas อุ่นใจ(inferred from the name graph)
- NLNetherlands1 in 2.9M
- IDIndonesia≈1 in 368Kas อุ่นใจ
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 Onchai 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.
- Thailand (inferred from the name graph)
- 2 (measured from records)
- Sources
- 88 (measured from records)
- 1 in 2.9M (inferred from the name graph)
≈5,200 named อุ่นใจ, est.
recorded for this name
Highest-authority source
Netherlands
measured from records inferred from the name graph
Spellings & scripts(measured from records)
13 other spellings are counted as the same name:
Locally spelled อุ่นใจ in TH Thailand, ID Indonesia.
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 in 1 language in the etymology graph.
Where in the world(measured from records)
Onchai 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 | ||||
|---|---|---|---|---|---|---|
| TH Thailand | #343 | ≈5,200 est. | ≈1 in 13K | #786,333 | อุ่นใจ | 88 |
| ID Indonesia | — | ≈730 est. | ≈1 in 368K | — | อุ่นใจ | 1 |
| ES Spain | — | 32as Injai | 1 in 1.6M | 32 | — | — |
| CH Switzerland | — | 8as Injai | 1 in 1.1M | 8 | — | — |
| PL Poland | — | 7as Injai | 1 in 5.5M | 4 | — | — |
| NL Netherlands | — | 6 | 1 in 2.9M | 6 | Onchai | 3 |
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: INE — Padrón per-token widgets (current living counts, given + apellidos); INE — Apellidos más frecuentes (Padrón Municipal); CBG Familienamenbank — Dutch surname bearer counts (GBA/BRP 2007); BFS — Familiennamen der Wohnbevölkerung (surnames); dane.gov.pl — PESEL living persons (surnames). 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).
Evidence(measured from records)
Attested in 2 sources across 1 country.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| NL Netherlands | CBG Familienamenbank — Dutch surname bearer counts (GBA/BRP 2007) | 2007 | 6 | #73,646 |
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
- In which country does Onchai have the most bearers?
- Mondonomo estimates about 5.2 thousand people named อุ่นใจ in Thailand, more than in any other country we hold.
- Where is Onchai most common?
- Measured as a share of residents rather than as a count, Onchai is densest in the Netherlands — about 1 in 2.9 million people — even though Thailand holds more of our records for it.
- How common is the name Onchai?
- In the Netherlands, the national register counted 6 people named Onchai in 2007, about 1 in 2.9 million residents.
- How common is Onchai compared with other names?
- In Thailand, Onchai is the 343rd most common surname of 1,135,150 surnames recorded there.
What do you want to know about Onchai?
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/onchaiThe 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, “Onchai” — the 343rd most common surname in Thailand. Data snapshot 2026-10-10.