Thennakoon
surname · Latin script
Recorded for both men and women· direction only, no split published
Thennakoon is a surname written in the Latin script, with more bearers in Sri Lanka than in any other country.
- LKSri Lanka≈1 in 1.2K(inferred from the name graph)
- NZNew Zealand≈1 in 1M
- SGSingapore≈1 in 1.1M
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.
- Sri Lanka (inferred from the name graph)
- Sources
- 31 (measured from records)
- ≈1 in 1.2K (inferred from the name graph)
≈20,000 people, est.
Highest-authority source
Sri Lanka, est.
measured from records inferred from the name graph
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)
Thennakoon 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 | ||||
|---|---|---|---|---|---|---|
| LK Sri Lanka | #107 | ≈20,000 est. | ≈1 in 1.2K | — | Thennakoon | 31 |
| IT Italy | — | ≈15 est. | ≈1 in 4.1M | — | Thennakoon | 4 |
| US United States | — | ≈9 est. | ≈1 in 36M | — | Thennakoon | 25 |
| IN India | — | ≈7 est. | ≈1 in 180M | — | Thennakoon | 3 |
| GB United Kingdom | — | ≈6 est. | ≈1 in 11M | — | Thennakoon | 12 |
| SG Singapore | — | ≈6 est. | ≈1 in 1.1M | — | Thennakoon | 4 |
| NZ New Zealand | — | ≈5 est. | ≈1 in 1M | — | Thennakoon | 2 |
| CA Canada | — | ≈4 est. | ≈1 in 10M | — | Thennakoon | 7 |
| PL Poland | — | 2 | 1 in 19M | 2 | — | — |
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: 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 |
|---|---|---|---|---|
| PL Poland | dane.gov.pl — PESEL living persons (surnames) | 2026 | 2 | — |
| PL Poland | dane.gov.pl — PESEL living persons (names) | — | 2 | #394,886 |
Register rows as of the 2026-10-09 data build.
Frequently asked questions
- In which country does Thennakoon have the most bearers?
- Mondonomo estimates about 20 thousand people named Thennakoon in Sri Lanka, more than in any other country we hold, where it is most often spelled thennakoon.
- How common is the name Thennakoon?
- In Poland, the national register counted 2 people named Thennakoon in 2026, about 1 in 19 million residents.
- How common is Thennakoon compared with other names?
- In Sri Lanka, Thennakoon is the 107th most common surname of 20,196 surnames recorded there.
What do you want to know about Thennakoon?
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/thennakoonThe 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, “Thennakoon” — the 107th most common surname in Sri Lanka. Data snapshot 2026-10-10.