Llewelyn
surname · Latin script
Meaning: the original Welsh spelling of Llewellyn
Recorded as a male name· opposite-gender records fall within measured source noise
Llewelyn is a surname written in the Latin script, with more bearers in the United Kingdom than in any other country.
- GBUnited Kingdom≈1 in 114K(inferred from the name graph)
- USUnited States1 in 885K
- AUAustralia≈1 in 114K
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
- 153 (measured from records)
- ≈1 in 114K (inferred from the name graph)
≈580 people, est.
Highest-authority source
United Kingdom, est.
measured from records inferred from the name graph
Meaning & origin(measured from records)
the original Welsh spelling of Llewellyn.
Sources 1
- Dictionary of American Family Names
Attested across 2 languages in the etymology graph.
Where in the world(measured from records)
Llewelyn 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 | ≈580 est. | ≈1 in 114K | listed | Llewelyn | 127 |
| US United States | 376 | 1 in 885K | 423 | Llewelyn | 153 |
| AU Australia | ≈220 est. | ≈1 in 114K | 1 | Llewelyn | 87 |
| CA Canada | ≈37 est. | ≈1 in 1M | — | Llewelyn | 29 |
| IT Italy | ≈32 est. | ≈1 in 1.9M | — | Llewelyn | 3 |
| SG Singapore | ≈14 est. | ≈1 in 459K | — | Llewelyn | 13 |
| NZ New Zealand | ≈13 est. | ≈1 in 376K | — | Llewelyn | 13 |
| LB Lebanon | ≈12 est. | ≈1 in 450K | — | Llewelyn | 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: Census Bureau — Surname Frequency 2010; Census Bureau — Surname Frequency 2020; SA BDM — Popular baby names South Australia (1944–present). 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).
Notable people with this name(measured from records)
- John Dillwyn Llewelynb. 1810GBBritish photographer and botanist (1810-1882)
- Thereza Dillwyn Llewelynb. 1834GBWelsh photographer and astronomer (1834-1926)
- Desmond Llewelynb. 1914GBBritish actor (1914-1999)
- John E. Llewelynb. 1928GBWelsh philosopher
- Barry Llewelynb. 1948GBWelsh rugby union player
- Emrys Llewelynb. 1953GBauthor
- Haf Llewelynb. 1964GBWelsh author
- Dafydd Llewelynb. 1968writer (1968- )
- Hugh LlewelynGBphotographer
- Dylan LlewelynGBtelevision producer and writer
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 31 sources across 19 countries.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| US United States | Census Bureau — Surname Frequency 2020 | 2020 | 423 | #52,889 |
| US United States | Census Bureau — Surname Frequency 2010 | 2010 | 376 | #54,752 |
| US United States | Census Bureau — Surname Frequency 2000 | 2000 | 340 | #56,246 |
| US United States | wru Name Dictionary — US surnames, Census 2010 subset (Khanna et al.) | — | — | — |
Reference works 5
- Dictionary of American Family Names
- The Oxford Dictionary of Family Names in Britain and Ireland
- Wikipedia given-name tokens
- Wikipedia surname tokens
- Wikidata name items (native-script + romanized given/family names)
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
- What does the name Llewelyn mean, and where does it come from?
- the original Welsh spelling of Llewellyn. Recorded by Dictionary of American Family Names.
- What are other forms of the name Llewelyn?
- In the etymology graph, Llewellyn is a form of the same name in other languages.
- In which country does Llewelyn have the most bearers?
- Mondonomo estimates about 578 people named Llewelyn in the United Kingdom, more than in any other country we hold, where it is most often spelled llewelyn.
- How common is the name Llewelyn?
- In the United States, the national register counted 376 people named Llewelyn in 2010, about 1 in 885 thousand residents.
What do you want to know about Llewelyn?
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/llewelynThe 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, “Llewelyn”. Data snapshot 2026-10-10.