Thomasina
Thomasina, Thomasine, or Thomasena is the feminine form of the given name Thomas, which means "twin". Thomasina is often shortened to Tamsin. Tamsin can be used as a name in itself; variants of Tamsin include Tamsyn, Tamzin, Tamsen, Tamzen, Tammi, Tamzie and Tamasin. The version "Tamsin" is especially popular in Cornwall and Wales. Along with Tamara it is the ancestor of "Tammy".
- English
Meaning & Origin of Thomasina
What this name means, where it came from, and how it has traveled across cultures.
Thomasina, Thomasine, or Thomasena is the feminine form of the given name Thomas, which means "twin". Thomasina is often shortened to Tamsin. Tamsin can be used as a name in itself; variants of Tamsin include Tamsyn, Tamzin, Tamsen, Tamzen, Tammi, Tamzie and Tamasin. The version "Tamsin" is especially popular in Cornwall and Wales. Along with Tamara it is the ancestor of "Tammy".
Source: Wikipedia (CC BY-SA 3.0). Read more →
Cultural Origins (via Behind the Name)
- English
The Story of Thomasina
The earliest SSA record of Thomasina as a baby girl name dates back to 1904, when 6 babies received it. 1966 was its biggest year on record, with 85 newborns named Thomasina — #1,153 in the national rankings. Its most recent appearance in the national data came in 2019 (6 births); the name has since faded from the published rankings. In total, more than 4K Thomasinas have been born in the U.S. since records began in 1880, spanning the 1900s through the 2020s.
Popularity Over Time
Popularity by State
Variants & Related Forms of Thomasina
Foreign forms, alternate spellings, and nicknames that share roots with Thomasina. Linked entries have a profile on Peek a Name.
Names that sound like Thomasina
Phonetically similar names — useful when Thomasina is the vibe but a different syllable count or letter feel might suit better. Linked entries have a profile on Peek a Name.
Source: Datamuse . Phonetic similarity ranking, not curated.
Frequently Asked Questions about Thomasina
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About the name Thomasina
Thomasina is a girl baby name tracked by the U.S. Social Security Administration. It first appeared in SSA records in 1904 and has accumulated 4K births in the dataset. Thomasina's peak popularity came in 1966 when it ranked #1,153. Use the chart and map above to compare Thomasina's trajectory across years and U.S. states, or browse the related names section to discover similar choices.
Continue exploring
- Top names of 1966 →
- Names of the 1960s →
- Names starting with "T" →
- Browse all girl names →
- Top names of 2026 →
Data sources
- Birth statistics (counts, ranks, years 1880–2026) — U.S. Social Security Administration . Predictions for years not yet released by SSA are computed by Peek a Name from historical trends; we update with official data as soon as it ships.
- Etymology, cultural origins, and related forms — Behind the Name (used under their public API terms).
- Meaning prose and editorial summary — Wikipedia article extracts, licensed under CC BY-SA 3.0 .
- Predicted nationality distribution — Nationalize.io .
- Phonetically similar names — Datamuse .
Peek a Name aggregates and presents the above data for informational purposes. Statistical predictions and external attributions are clearly labelled where shown; we make no guarantee of accuracy beyond what each source provides.