Thomasine
Feminine · “twin”
This is not a Victorian invention or a modern feminising of a man's name. Thomasine was an ordinary English woman's name for centuries, common enough in Tudor and Stuart parish registers to be unremarkable, and the surprise is not that it exists but that it ever stopped being usual.
How old is the name Thomasine?
Thomasine first appears in US birth records in 1909 — 116 years ago. The typical Thomasine alive today was born around 1948, making them about 77 years old. About 1,300 people named Thomasine are estimated to be alive in the US today.
When was the name Thomasine most popular?
Thomasine peaked in 1941, reaching #993 nationally. See the whole 1941 chart.
Lists built from the same records:
Where it comes from
From Te'oma to Thomasine
The story of Thomasine
The apostle behind the name has a living inheritance a long way from where his story is usually told. On the Malabar coast of southern India there are Christian communities who trace their church directly to him, holding that he arrived by sea in the first century, preached along the coast and died near Madras. Whatever the history, the communities are genuinely ancient: they were established long before European missionaries reached India and had their own liturgy, their own bishops and their own Syriac language when the Portuguese arrived and were astonished to find them. They are among the oldest continuous Christian populations anywhere, and they are named for him.
Meaning
twin
The base name is Aramaic and means a twin. It functioned as a description before it functioned as a name, which is why the Greek gospels supply a translation alongside it rather than treating it as a proper noun.
How the name formed
- Te'oma
- Thomas
- Thomasine
Related forms: Tommasina · Tomasa · Thomasse · Thomasin
Pronouncing Thomasine
TOM-uh-seen
Three syllables with the stress at the front. The ending can be said -seen or -sin, and both are historically respectable; the shorter one produced Tamsin.
Nicknames for Thomasine
Moderate
What the data says
146 years of official birth records
The long climb, and where it stands now
The same years in position rather than babies
- First recorded
- 1909
- Most girls named
- 195660 — the highest on record
- Peak rank
- #993reached in 1941
- Change vs 1987
- −14.3%6 in 1994, from 7
Rank is a position, a count is a headcount, and they move independently — a name can hold its rank while the number of babies behind it falls. Source: U.S. Social Security Administration.
Thomasine in other languages
The same name elsewhere
- Tommasina in Italian — same name
- Tomasa in Spanish — related form
- Thomasse in French — related form
- Thomasin in English — spelling variant
Thomasines among us
people named Thomasine are estimated to be alive in the US today
Estimated from SSA birth records and published actuarial life tables. Method
Is it right for you
Questions parents actually ask
Fashion outlook
Thomasine sits outside the current charts, and that is its own kind of answer: naming cycles can only date the names they carried up. A name this rare has no decade stamped on it — it cannot go out of fashion, because it was never in.
Based on 146 years of naming cycles. How we read them
The trade-off
- It is genuinely old rather than an invented feminine, which few names of this shape can claim.
- Tamsin sits inside it as a short form with an independent history.
- The meaning is concrete and unusual without being obscure.
- It is long and the spelling will need giving letter by letter.
- Thomasina and Thomasin are both standard and will be substituted.
- The ending is unstable, so the name has two respectable pronunciations.
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What they receive
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Thomasine
Feminine
Frequently asked
- How many Thomasines are there in the world?
- No country counts the world's names, so there is no worldwide figure — anyone quoting one is estimating. About 1,300 people named Thomasine are estimated to be alive in the US today.
- How popular is the name Thomasine in 2025?
- Thomasine is rarely given in the US today — it does not rank in the top 2000 girl names.
- Will my child share the name Thomasine with classmates?
- Thomasine will almost certainly be the only one in school.
More T names
The most-given names starting with T, all years combined.
Teresa#908 · Theresa#1548 · Tiffany#878 · Tammy#3645 · Taylor#403 · Tina#2778 · Tracy#2153 · Thelma#4661
Looking for what else is popular rather than what resembles Thomasine? See the current top 100.
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US figures from the Social Security Administration. 1880–2025. Data & methodology
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