Thomasine
A feminine form of Thomas, derived from the Aramaic name meaning "twin".
Name Census estimates that about 1,100 living Americans carry the first name Thomasine. The name is used almost exclusively for girls. The average person named Thomasine today is around 68 years old, and the year with the single highest number of Thomasine births was 1950 (67 babies).
This page is the full Name Census profile for Thomasine. Below you will find a gender breakdown showing how the name splits between male and female registrations, a year-by-year popularity chart stretching back to 1880, decade-level totals, the top US states for this name, its meaning and etymology, and a set of frequently asked questions with data-backed answers.
Key insights
- • The typical person named Thomasine is about 68 years old today, placing it firmly among the names of earlier generations. Most living Thomasines were born before 1968.
People living today
1.1K
~ 1 in 311,595 Americans
Peak year
1950
67 babies that year
Average age
68
years old
1994 SSA rank
#13,305
Tracked since 1909
Popularity
Thomasine: popularity over time
The SSA tracks Thomasine from the 1900s through to the 1990s, spanning 10 decades of birth certificate data. The biggest single decade for the name was the 1940s, with 505 total registrations. Usage has dropped considerably from its 1940s peak. The most recent decade brought in only a fraction of the registrations that the name once attracted.
Babies born per year
Decades
Thomasine by decade
The table below breaks the full SSA timeline into ten-year windows. Each row shows how many male and female babies were given the name Thomasine during that decade, along with a combined total. This is useful for spotting eras where the name surged or retreated.
Geography
Where Thomasines live
The SSA's state-level files cover 10 states and territories. Virginia, District of Columbia, Pennsylvania recorded the most babies named Thomasine, while Massachusetts, Alabama, Illinois recorded the fewest. The average across all reporting states is about 51 registrations each.
Origin
Meaning and history of Thomasine
Thomasine is a feminine given name derived from the Greek name Thomas, which itself originated from the Aramaic name Toma, meaning "twin". The name Thomasine emerged as a French variant of the name Thomas during the Middle Ages.
The earliest recorded use of the name Thomasine dates back to the 13th century in France, where it was used as a feminine form of the popular male name Thomas. It gained popularity among the French nobility and upper classes during this period.
One of the earliest known bearers of the name Thomasine was Thomasine Spinola, a 13th-century Italian noblewoman and member of the powerful Spinola family of Genoa. She lived from around 1230 to 1312 and played a significant role in the political affairs of her time.
In the 14th century, Thomasine de Warwick, born around 1314, was an English aristocrat and the wife of Sir John de Peyto. She was known for her involvement in various legal disputes over land ownership and inheritance rights.
During the Renaissance period, Thomasine Bonaventure, born in 1555, was a French poet and writer who published several works, including a collection of sonnets and a tragedy. She was also known for her involvement in literary circles and her patronage of the arts.
In the 17th century, Thomasine von Bülow, born in 1615, was a German noblewoman and the wife of Count Johann von Bülow. She was renowned for her charitable works and her efforts to promote education and social welfare in her region.
Thomasine Hall, born in 1825, was a 19th-century British author and playwright. She wrote several novels and plays, including the popular work "The Danites in the Sierras" published in 1877.
While the name Thomasine has declined in popularity in recent times, it remains a unique and historically significant name with roots tracing back to the Middle Ages and the Renaissance period.
People
Thomasine + last name combinations
How many people share a full name with Thomasine as the first name? Click a combination below to see the estimate, or search any pairing.
Related
Other names starting with T
Other first names starting with T with a similar number of bearers.
FAQ
Thomasine: questions and answers
How many people in the U.S. are named Thomasine?
Name Census puts the figure at roughly 1,100 living Americans. We arrive at this by taking every SSA birth registration for Thomasine going back to 1880 and adjusting each cohort for expected survival using CDC actuarial life tables. The result is an age-weighted living-bearer count, not a raw birth total. That works out to about 1 in 311,595 US residents.
Is Thomasine a common name?
We classify Thomasine as "Rare". It ranks above 90.7% of all first names in the SSA dataset by living bearers. Across the full history of the data, 2,234 babies have been registered with this name.
When was Thomasine most popular?
The single biggest year for Thomasine was 1950, when 67 babies received the name. The fact that the average living Thomasine is about 68 years old gives you a rough sense of which era contributed the most bearers who are still alive today.
Is Thomasine a female name?
Yes, 100.0% of people registered as Thomasine in the SSA data are female. You can see the full per-sex comparison in the gender distribution section above, which includes the latest year rank, birth count, and peak year for each sex.
Where does this data come from?
First-name figures come from the Social Security Administration's national baby name files, which cover every name on a birth certificate from 1880 to 2024. Living-bearer estimates layer in CDC actuarial life tables broken out by sex to account for mortality. The population baseline (342,754,338) is the Census Bureau's latest national estimate. You can read the full calculation on our methodology page.