Girl · #15,243 in 2026

Tamsyn

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".

Current Rank
#15,243
Peak Rank
#7,601 (2016)
Total Babies
180
5-Yr Trend
-44%
1976
First Year
2024
Last Year
2016
Peak Year
#7601
Peak Rank
180
Total Count
22
Years Active

Meaning & Origin of Tamsyn

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 →

The Story of Tamsyn

Tamsyn first appeared in U.S. Social Security Administration records as a baby girl name in 1976, with 11 babies given the name that year. Its peak popularity came in 2016, when 15 Tamsyns were born — ranking #7,601 that year. As of 2026, Tamsyn ranks #15,243 for baby girls with 5 births, falling sharply (-44%). In total, more than 180 Tamsyns have been born in the U.S. since records began in 1880, spanning the 1970s through the 2020s.

Popularity Over Time

Popularity by State

ME
WA
MT
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WI
MI
NY
VT
NH
MA
OR
ID
SD
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IL
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OH
PA
NJ
CT
RI
CA
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NE
MO
KY
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MD
DE
DC
UT
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AR
TN
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LA
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Top 10
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500+
No data

Names that sound like Tamsyn

Phonetically similar names — useful when Tamsyn 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 Tamsyn

What does the name Tamsyn mean?
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".
How popular is Tamsyn in 2026?
In 2026, Tamsyn ranks #15,243 among girls' names in the U.S., with 5 babies given the name that year.
When was Tamsyn most popular?
Tamsyn reached its peak popularity in 2016, ranking #7,601 that year with 15 babies given the name.
Is Tamsyn a unisex name?
In U.S. Social Security records, Tamsyn is primarily a girl's name. We don't have meaningful data for it as a boy's name.
What names go well with Tamsyn?
Names that share a similar style or popularity range with Tamsyn include Ruhama, Adaira, Sira. These pairings are based on rank proximity and naming era in U.S. data.

Similar Names

👧
Ruhama
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Adaira
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Sira
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👧
Zoiee
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👧
Adileny
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Jaymes
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Yalena
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Niala
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About the name Tamsyn

Tamsyn is a girl baby name tracked by the U.S. Social Security Administration. It first appeared in SSA records in 1976 and has accumulated 180 births in the dataset. Tamsyn's peak popularity came in 2016 when it ranked #7,601. Use the chart and map above to compare Tamsyn's trajectory across years and U.S. states, or browse the related names section to discover similar choices.

Continue exploring

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.