Duncan-John
surname · Latin script
Recorded as a male name· opposite-gender records fall within measured source noise
Duncan-John is a surname written in the Latin script, with more bearers in the United Kingdom than in any other country.
- GDGrenada1 in 113K(measured from records)
- GBUnited Kingdom≈1 in 18M
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 Kingdom (inferred from the name graph)
- Sources
- 10 (measured from records)
- 1 in 113K (inferred from the name graph)
≈4 people, est.
Highest-authority source
Grenada
measured from records inferred from the name graph
Spellings & scripts(measured from records)
One other spelling is counted as the same name:
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.
Where in the world(measured from records)
Duncan-John 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 | |||
|---|---|---|---|---|---|
| GB United Kingdom | ≈4 est. | ≈1 in 18M | — | Duncan-John | 10 |
| GD Grenada | 1 | 1 in 113K | 1 | — | — |
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: Grenada — Consolidated List of Electors December 2025. 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 1 sources across 1 country.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| GD Grenada | Grenada — Consolidated List of Electors December 2025 | 2025 | 1 | #222 |
Register rows as of the 2026-10-09 data build.
Frequently asked questions
- In which country does Duncan-John have the most bearers?
- Mondonomo estimates about 4 people named Duncan-John in the United Kingdom, more than in any other country we hold, where it is most often spelled Duncan-John.
- Where is Duncan-John most common?
- Measured as a share of residents rather than as a count, Duncan-John is densest in Grenada — about 1 in 113 thousand people — even though United Kingdom holds more of our records for it.
- How common is the name Duncan-John?
- In Grenada, the national register counted 1 people named Duncan-John in 2025, about 1 in 113 thousand residents.
What do you want to know about Duncan-John?
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/duncan-johnThe 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, “Duncan-John”. Data snapshot 2026-10-10.