Tamsin
given name · Latin script
Meaning: Contracted form of Latinate Thomasina, a feminine form of Thomas
Recorded as a female name· opposite-gender records fall within measured source noise
/təmzɪn/(machine-generated) pronunciation, model-generated
Tamsin is a given name written in the Latin script, with more bearers in the United Kingdom than in any other country.
- GBUnited Kingdom≈1 in 22K(inferred from the name graph)
- AUAustralia≈1 in 32K
- USUnited States1 in 529K
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)
- 2 (measured from records)
- Sources
- 201 (measured from records)
- ≈1 in 22K (inferred from the name graph)
≈3,000 people, est.
recorded for this name
Highest-authority source
United Kingdom, est.
measured from records inferred from the name graph
Spellings & scripts(measured from records)
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(measured from records)
Contracted form of Latinate Thomasina, a feminine form of Thomas. This was relatively common throughout Britain in the Middle Ages, but confined to Cornwall immediately before its recent revival.
Sources 1
- A concise dictionary of first names
Attested across 2 languages in the etymology graph.
Often considered alongside
Names that people choosing a name often weigh against Tamsin, most often first. They share a style rather than an origin.
From the names suggested together in public name-advice forums, in English. A list of what people consider, not a measure of how common any name is.
Where in the world(measured from records)
Tamsin 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 | — | ≈3,000 est. | ≈1 in 22K | 5 | Tamsin | 192 |
| ZA South Africa | — | ≈810 est. | ≈1 in 70K | — | Tamsin | 51 |
| AU Australia | — | ≈780 est. | ≈1 in 32K | 5 | Tamsin | 128 |
| US United States | — | 629 | 1 in 529K | 623 | Tamsin | 201 |
| ES Spain | — | ≈180 est. | ≈1 in 273K | — | Tamsin | 20 |
| NZ New Zealand | #995 | ≈140 est. | ≈1 in 34K | 10 | Tamsin | 70 |
| IE Ireland | — | ≈24 est. | ≈1 in 214K | — | Tamsin | 23 |
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: NRS — Baby names Scotland full list (1974–present); Census Bureau — First Name Frequency 2020 by sex; Australian national given names (aggregated state BDM); DIA — Baby name popularity (1900–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).
Other recorded senses(measured from records)
Tamsin is also recorded in 3 other lexicons, as a different name or as an ordinary word. These are senses of the spelling, not of the name above.
In English, A female given name from Aramaic.
as a wordkaikki.org Wiktionary extract (IPA + transliterations)
In English, Cornish form of Thomas
as a nameBaby names, 25,350 baby names nicknames for your family, friends pets, including the top 100 names, 2,000 most popular…
English: contracted form of Thomasina (see THOMAS ), relatively common throughout Britain in the Middle Ages, but confined to Cornwall immediately before its recent revival.
as a word
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.
Notable people with this name(measured from records)
- Tamsin Wiltonb. 1952GBEnglish academic
- Tamsin Olivierb. 1963GBBritish actress
- Tamsin Greigb. 1966GBBritish actress (born 1966)
- Tamsin Westb. 1974AUAustralian actress
- Tamsin A. Matherb. 1976GBBritish Professor of Earth sciences
- Tamsin Carrollb. 1979AUactor
- Tamsin Edwardsb. 1979GBBritish climate scientist (1979-)
- Tamsin Omondb. 1984GBBritish author, environmental activist and journalist
- Tamsin Egertonb. 1990GBBritish actress
- Tamsin Cookb. 1998AUAustralian swimmer
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).
How to address them(machine-generated)
A formal English salutation is built on the surname, so it needs a full name — on its own, a first name only supports the informal form.
Evidence(measured from records)
Attested in 34 sources across 21 countries.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| US United States | Census Bureau — First Name Frequency 2020 by sex | 2020 | 623 | #17,498 |
| US United States | SSA — National Baby Names (1880–present) | 2017 | 27 | — |
| US United States | SSA — National Baby Names (1880–present) | 2016 | 23 | — |
| US United States | SSA — National Baby Names (1880–present) | 2015 | 22 | — |
| US United States | SSA — National Baby Names (1880–present) | 2019 | 21 | — |
| US United States | SSA — National Baby Names (1880–present) | 2020 | 20 | — |
| US United States | SSA — National Baby Names (1880–present) | 2014 | 19 | — |
| US United States | SSA — National Baby Names (1880–present) | 2018 | 17 | — |
| US United States | SSA — National Baby Names (1880–present) | 2022 | 14 | — |
| US United States | SSA — National Baby Names (1880–present) | 2021 | 14 | — |
| US United States | SSA — National Baby Names (1880–present) | 2013 | 14 | — |
| US United States | SSA — National Baby Names (1880–present) | 2012 | 13 | — |
Reference works 2
- Wikipedia given-name 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 are other forms of the name Tamsin?
- In the etymology graph, Tomasa, Thomasina and Tamsyn are forms of the same name in other languages.
- Where does the name Tamsin come from?
- Contracted form of Latinate Thomasina, a feminine form of Thomas. This was relatively common throughout Britain in the Middle Ages, but confined to Cornwall immediately before its recent revival. Recorded by A concise dictionary of first names.
- How do you pronounce Tamsin?
- A machine transcription gives /təmzɪn/ (IPA) for English.
- Is Tamsin a male or female name?
- Tamsin is a female name in our records. Opposite-gender entries fall within the cross-gender noise we measure in the source data, so we don't report them as usage.
- What does the name Tamsin mean?
- Recorded meaning: Contracted form of Latinate Thomasina, a feminine form of Thomas.
- In which country does Tamsin have the most bearers?
- Mondonomo estimates about 3.0 thousand people named Tamsin in the United Kingdom, more than in any other country we hold, where it is most often spelled tamsin.
- How common is the name Tamsin?
- In the United States, the national register counted 629 people named Tamsin in 2020, about 1 in 529 thousand residents.
- How common is Tamsin compared with other names?
- In New Zealand, Tamsin is the 995th most common given name of 26,737 given names recorded there.
What do you want to know about Tamsin?
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/tamsinThe 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, “Tamsin” — the 995th most common given name in New Zealand. Data snapshot 2026-10-10.