Thomasin
given name · Latin script
Meaning: A female given name from Aramaic, a feminine form of Thomas
Recorded as a female name· opposite-gender records fall within measured source noise
/tʰɑməsən/(machine-generated) pronunciation, model-generated
Thomasin is a given name written in the Latin script, most frequently recorded in the United States.
- ARArgentina
- USUnited States
Where the name is found, darker where our sources hold more of it. No national register counts its bearers anywhere we hold data, so the map carries no figures. One hue, darker where it is more common; hover a country for its figure.
- United States (inferred from the name graph)
- Sources
- 8 (measured from records)
no count published
Highest-authority source
measured from records inferred from the name graph
Meaning & origin(measured from records)
A female given name from Aramaic, a feminine form of Thomas.
Sources 1
- kaikki.org Wiktionary extract (IPA + transliterations)
Often considered alongside
Names that people choosing a name often weigh against Thomasin, 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)
Thomasin counted together with the spellings and other-language forms grouped with it. Where a register counted another spelling, the row names it.
| Country | Most common spelling | Sources | ||
|---|---|---|---|---|
| US United States | — | 12 | Thomasin | 6 |
| AR Argentina | — | — | Thomasin | 1 |
| CH Switzerland | — | 8 | — | 1 |
| NL Netherlands | — | listed | — | — |
| FR France | — | listed | — | — |
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: SSA — National Baby Names (1880–present); BFS — Familiennamen der Wohnbevölkerung (surnames); the babynamen-king-2020 register; the athias-prenoms-2007 register. 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)
Thomasin is also recorded in one other lexicon, as a different name or as an ordinary word. These are senses of the spelling, not of the name above.
In French, Dérivé de Thomas, « jumeau »; forme hypocoristique/variante régionale de Thomas.
as a nameDictionnaire généalogique des prénoms
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.
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 8 sources across 6 countries.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| US United States | SSA — National Baby Names (1880–present) | 2023 | 16 | — |
| US United States | SSA — National Baby Names (1880–present) | 2025 | 12 | — |
| US United States | SSA — National Baby Names (1880–present) | 2021 | 12 | — |
| US United States | SSA — National Baby Names (1880–present) | 2022 | 9 | — |
| US United States | SSA — National Baby Names (1880–present) | 2024 | 7 | — |
| US United States | SSA — National Baby Names (1880–present) | 2020 | 6 | — |
| US United States | SSA — National Baby Names (1880–present) | 1971 | 5 | — |
| US United States | SSA — National Baby Names (1880–present) | 1963 | 5 | — |
| FR France | Dictionnaire Généalogique des Prénoms (Athias, 2007) | — | — | — |
| NL Netherlands | Babynamen — Lijst met meer dan 22.000 namen (Amelia King, 2020) | — | — | — |
| FR France | Dictionary of French Prénoms (Benoist, 2009) | — | — | — |
Register rows as of the 2026-10-09 data build.
Frequently asked questions
- How do you pronounce Thomasin?
- A machine transcription gives /tʰɑməsən/ (IPA) for English.
- Is Thomasin a male or female name?
- Thomasin 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 Thomasin mean, and where does it come from?
- A female given name from Aramaic, a feminine form of Thomas. Recorded by kaikki.org Wiktionary extract (IPA + transliterations).
- In which country does Thomasin have the most bearers?
- Thomasin is most frequently recorded in the United States, where it is most often spelled thomasin.
What do you want to know about Thomasin?
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/thomasinThe 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, “Thomasin”. Data snapshot 2026-10-10.