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Thomasine

Girls' name

Thomas with the suffix -ine

Thomasine has been given to 2,234 babies in the U.S. since 1909. It was used fewer than 5 times in 2025, so it doesn't appear in the latest year's list — today it's a genuinely uncommon pick. Its peak year was 1950, with 67 recorded.

Babies named Thomasine, 1994

1 in 619,000

Thomasine over time, 1880–2025

Girls
02040608018801900192019401960198020002020

Based on births in the U.S. Babies given the name each year. Hover the chart — or focus it and use the arrow keys — for any year. Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.

Thomasine: meaning, origin, and history

Thomas with the suffix -ine

Aramaic

What Thomasine means

Thomasine is formed from Thomas with the suffix -ine.

Origin, language, and formation

Thomasine is used in English. Its origins include Aramaic.

Related names and everyday forms

Related names include Thomas.

Pronunciation and spelling

In English, Thomasine is pronounced /ˈtɑm.əs.in/.

American usage and historical context

In the United States, 2,234 girls were recorded with the name Thomasine between 1909 and 1994. Its highest annual count was 67 in 1950; its best national rank was #1,004 in 1941.

Sources & methodologyReferences, data & attribution

Meaning, origin, and language notes draw on the references below.

American popularity figures use published Social Security Administration records for this exact spelling. Counts below five for a name, sex, and year are omitted.

Wiktionary material is available under CC BY-SA 4.0.

How common is Thomasine?

Thomasine had fewer than 5 recorded uses in 2025, so these figures use 1994, the last year it was published.

Among all babies, 1994
1 in 619,000
6 of 3,715,972 births
Among girls only
1 in 297,000
<0.01% of girls
Rank, 1994
Unranked
Fewer than 5 uses
Coin-flip room size
429,287 kids
Even odds of a second one

Where Thomasine sits on the popularity scale

Rarest published (5 a year)#1 — Olivia (13,544)

Chance at least one other child shares the name

If the other children were drawn at random from the 1994 national name distribution. Real classrooms cluster by region and community, so treat these as a floor, not a ceiling.

Class of 20Under 1%
Class of 30Under 1%
Grade of 100Under 1%
School of 500Under 1%

Put another way: gather 429,287 children born in 1994 and it's an even bet that one of them is another Thomasine. In a class of 30 the chance is Under 1%.

When Thomasines were born

Half of everyone ever recorded as Thomasine was born before 1948 — so the typical Thomasine is around 77 today.

Median birth year
1948
About 77 years old
Biggest decade
1940s
22.6% of all use
Born in the last 25 years
11.0%
Spread across generations
Recorded since 1950
1,042
People you could plausibly meet
Choose a decade

1940s — 22.6% of all recorded uses (505).

Is Thomasine rising or falling?

Rank movement and count movement can disagree — the number of distinct names in use keeps growing, so a name holding a steady count still slides down the list. Both are shown.

Rank vs 1 year ago
—
Not ranked then
Rank vs 5 years ago
New entry
Not ranked then
Rank vs 10 years ago
—
Not ranked then
Births vs 10 years ago
—
Not published both years
Share of its own peak
0%
Peak was 1950 (67)
Years since peak
75
Years
Year-to-year steadiness
Volatile
25.3% average annual change
Best rank ever
#1,004
1941

Spellings of Thomasine

Thomasine is not the most common spelling — Thomasina is, with 55.6% against Thomasine's 33.0%.

Grouped by closeness of spelling (up to two letter changes), same sex, with a floor on all-time use. It catches Sophia/Sofia and Aiden/Ayden, and misses spellings that sound alike but look different, like Sean and Shawn.

Where Thomasine is used

Across 1910–2025, Thomasine was most concentrated in District of Columbia — about 1 in 6,250 girls, against 1 in 98,556 across all states with data. It was least common in New York (1 in —).

016 per 100,000

Most concentrated

  1. 1District of Columbia1 in 6,250
  2. 2Virginia1 in 25,000
  3. 3Maryland1 in 100,000
  4. 4North Carolina1 in 100,000
  5. 5Pennsylvania1 in 100,000
  6. 6South Carolina1 in 100,000
  7. 7Alabama1 in —
  8. 8Illinois1 in —

Shading is the share of that state's recorded girls given this name, not the raw count — otherwise the map would just show which states are biggest. Unshaded states have no published records for this period. U.S. birth records suppress state-year counts below 5; state counts therefore don't add up to the national total. Every state links to its full rankings. Thomasine has too little recent state data to map, so this covers all years from 1910.

Thomasine around the world

Where Thomasine ranks in official birth records elsewhere in the world. Rankings only — the number of births isn’t comparable between places, so it isn’t shown.

  • France
    1900–1937
    #1,132
    in 1937
  • South Australia
    1947–1993
    #712
    in 1993

Popularity data from Institut national de la statistique et des études économiques and Consumer and Business Services (South Australia). INSEE data under Licence Ouverte / Etalab 2.0. CBS SA data under CC BY 4.0.

Notable people named Thomasine

People whose public names include Thomasine, backed by Wikidata given-name records and ordered by linked Wikimedia pages. The name may be a middle name.

People data from Wikidata (CC0). Fame is measured, not judged — the order reflects how widely each person is documented, not the U.S. birth records popularity this page is otherwise about.

Thomasine in other languages

Cross-language forms and variants of Thomasine. Linked forms have their own page here.

TamsinTasminTazminThomasinaThomasseThomazine

Variant forms from Wikidata (CC0). Most are used mainly outside the United States; U.S. birth records statistics cover US usage only.

Thomasine by the numbers

The raw record for each sex the name is used for.

As a girl's name

Rank in 2025
Unranked
Trend vs 5 yrs ago
—
Best rank ever
#1,004
1941
Peak year
1950
67 that year
First recorded
1909
Last recorded
1994
All-time count
2,234
Count in 2025
Under 5

Names similar to Thomasine

Matched on shared beginnings and endings, similar length, and comparable popularity.

ValentineMadelaineThomasinaAugustineJazzmineThomasenaJackelineJessamineSeraphineMarcelineRoselineJosselineAlbertineJoselineKarolineRosalineCaralineCelestineSharmaineMadalineDelaineEmalineYazmineMartine

Names with a curve like Thomasine

Not spelling — timing. These names rose, peaked and faded in the same years as Thomasine, so they read as being from the same moment even when they look nothing alike.

FrediaPhylissMarnaEarthaPhillisBetseyMarilouLanellNancieErlindaVonnieKathern

Sibling names for Thomasine

Names from the same era and popularity tier — the two things that make a sibling set feel deliberate — skipping lookalike spellings and shared initials.

Explore around Thomasine

Top names of 1950, Thomasine's peak yearThe 1950s in fullOther names that peaked in 1941Girls' names starting with T