2000
#124,872
National surname rank
Recorded bearers 127
First available Census row
Per 100,000 0.05
Very Rare Last name
Treworgy
An English habitational surname derived from a location in Cornwall.
According to the 2020 US Census Bureau surname tables, roughly 132 Americans carry the last name Treworgy. That puts it at #145,757 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,596,624 residents).
This page is the full Name Census profile for the Treworgy surname. You will find the Census Bureau frequency data, a multi-census history view, an ancestry and ethnicity breakdown based on self-reported demographics, the name's meaning and origin where available, and answers to the most common questions people ask about this surname.
Bearers in the US
132
1 in 2,596,624
Census rank
#145,757
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
115
very rare in the US
Popularity narrative
The Census Bureau recorded 115 bearers of the surname Treworgy in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 145757th position in the national surname ranking.
Among Census respondents with the surname Treworgy, the largest self-reported group is White at 96.5%. The next largest groups are Two or More Races (1.7%) and Asian/Pacific Islander (0.9%).
Origin
Meaning and origin of Treworgy
The surname Treworgy is believed to have originated in Cornwall, England, with roots dating back to the 16th century. It is thought to be a locational name derived from the Cornish place name Treworgy, meaning "dwelling at the higher town." This place name is likely a combination of the Cornish elements "tre," meaning homestead or settlement, and "worgy," meaning high or elevated.
One of the earliest recorded instances of the name Treworgy can be found in the Cornish Parish Registers, where a John Treworgy was listed in the parish of Wendron in 1565. The Treworgy family was well-established in the Cornish parishes of Wendron and Sithney during the 16th and 17th centuries.
In the late 17th century, the Treworgy surname began to appear in records outside of Cornwall, as some members of the family migrated to other parts of England and eventually to North America. Thomas Treworgy, born in 1650, is believed to be one of the earliest Treworgys to emigrate to the New World, settling in Massachusetts in the late 1600s.
Notable individuals with the surname Treworgy include John Treworgy (1745-1817), a Revolutionary War soldier from Massachusetts, and his son, James Treworgy (1770-1842), who served in the War of 1812. William Treworgy (1810-1890), a shipbuilder and merchant from Maine, was a prominent figure in the maritime industry of the 19th century.
In the late 19th and early 20th centuries, the Treworgy family produced several notable academics and educators. Arthur Treworgy (1873-1943) was a professor of mathematics at the University of Maine, while his brother, Walter Treworgy (1874-1941), was a professor of English at the same institution. Their cousin, Llewellyn Treworgy (1881-1964), was a renowned educator and served as the president of Bates College from 1920 to 1945.
While the Treworgy surname has its roots in Cornwall, it has since spread to other parts of the world, particularly in North America, where many descendants of the early Treworgy immigrants have settled and established themselves over the centuries.
Demographics
Ancestry and ethnicity for Treworgy
Among Census respondents with the surname Treworgy, the largest self-reported group is White at 96.5%. The next largest groups are Two or More Races (1.7%) and Asian/Pacific Islander (0.9%).
The bar chart below shows how Treworgy bearers described their own race and ethnicity on the 2020 Census form. The Census Bureau groups responses into six broad categories: White, Black or African American, Hispanic or Latino, Asian and Pacific Islander, American Indian and Alaska Native, and Two or More Races. When a category has too few respondents for a given surname, the Bureau suppresses the figure to protect individual privacy, which is why some names show fewer than six slices.
Percentages are shown for every Census year so the breakdown stays comparable over time. When the source file also includes raw headcounts, Name Census shows those alongside the percentages in the legend.
Keep in mind that these are self-reported numbers. A person's surname does not determine their race or ethnicity, and the distribution you see here reflects the specific population who happened to carry the Treworgy surname at the time of the 2020 Census, not any inherent property of the name itself.
- White96.5% · 111
- Two or more races1.7% · 2
- Asian and Pacific Islander0.9% · 1
- American Indian and Alaska Native0.9% · 1
Timeline
Historical Census data for Treworgy
Treworgy appears in 3 published Census surname files: 2000, 2010, 2020. The cards below show how the name's rank and bearer count changed across each release.
2010
#139,228
National surname rank
Recorded bearers 120
-7 bearers (-5.5%)
Per 100,000 0.04
Rank movement Down 14,356 places
2020
#145,757
National surname rank
Recorded bearers 115
-5 bearers (-4.2%)
Per 100,000 0.04
Rank movement Down 6,529 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #124,872 | 127 | 0.05 | First available Census row | First available Census row |
| 2010 | #139,228 | 120 | 0.04 | -7 bearers (-5.5%) | Down 14,356 places |
| 2020 | #145,757 | 115 | 0.04 | -5 bearers (-4.2%) | Down 6,529 places |
For 2020, the Census Bureau published race and Hispanic-origin columns as counts rather than percentages. Name Census converts those counts back into shares so the ancestry section stays comparable with the older surname files.
Year on year
2010 vs 2020 Census
How has the Treworgy surname changed between Census years? The chart shows bearer count side by side, and the table compares rank, count, and frequency.
Census year comparison
20102020
| Metric | 2010 | 2020 | Change |
|---|---|---|---|
| Rank | #139,228 | #145,757 | -4.7% |
| Count | 120 | 115 | -4.2% |
| Per 100K | 0.04 | 0.04 | -3.8% |
Between the 2010 and 2020 Census, the number of Treworgy bearers went from 120 to 115 (-4.2% change). The surname moved down 6,529 positions in the national ranking, going from #139,228 to #145,757.
FAQ
Treworgy surname: questions and answers
How many people in the U.S. have the surname Treworgy?
Name Census estimates that about 132 living Americans carry the surname Treworgy. Using the current population baseline, that works out to roughly 1 in 2,596,624 residents.
How common is Treworgy?
Treworgy ranks #145,757 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.04 per 100,000 residents, which is about 0 people out of every 100,000.
How many people with this surname were counted in the Census?
The raw 2020 Census file counted 115 people with the surname Treworgy. That is different from the site's living-bearer estimate (132), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.04 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.04 per 100,000 means that if you picked a random group of 100,000 U.S. residents, you would expect about 0 of them to have the surname Treworgy.
Has Treworgy become more or less common over time?
Between 2010 and 2020, the surname Treworgy went from 120 recorded bearers to 115. That is a decrease of 5 (-4.2%). In the national ranking it fell from #139,228 to #145,757.
What does the Census say about the background of Treworgy?
Among Census respondents with the surname Treworgy, the largest self-reported group is White at 96.5%. The next largest groups are Two or More Races (1.7%) and Asian/Pacific Islander (0.9%). These figures come from the 2020 Census Bureau surname tables, based on how respondents described their own race and ethnicity.
Which group reports this surname most often?
White is the largest self-reported group for the surname Treworgy in the 2020 Census, accounting for 96.5% (111 people in the source table).
What is the full ancestry breakdown?
Treworgy appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (96.5%), Two or More Races (1.7%), Asian/Pacific Islander (0.9%). For 2020, the source file also published raw headcounts for each group, which is why this page can show both percentages and counts in the ancestry section.
Is this page using the latest Census data?
Yes. This page is using the latest surname file currently loaded on Name Census, which is 2020. The historical section above also keeps any older Census surname entries we have for Treworgy (2000, 2010, 2020).
Does the Census include every surname?
No. The Census Bureau only publishes surnames that appeared at least 100 times in a given decennial Census. That means very rare surnames are excluded entirely, and a surname can appear in one Census release but disappear from a later one if it falls below the reporting threshold.
Why don't the ancestry percentages always add up to exactly 100%?
There are two main reasons: rounding and suppression. The Census Bureau rounds published values, and it may suppress very small cells to protect privacy. For 2020, the Bureau also published raw group counts rather than direct percentages, so Name Census converts those counts back into shares for comparability across census years.
What does Treworgy mean?
An English habitational surname derived from a location in Cornwall. The fuller origin note on this page goes into more detail.
Where does the surname data come from?
All surname statistics on Name Census are drawn from the US Census Bureau's decennial surname frequency tables. These files list every surname that appeared 100 or more times in the 2020 Census, along with a count, a per-100,000 rate, and a self-reported demographic breakdown. You can read the full explanation on our methodology page.
How does Name Census estimate living bearers?
For surnames, Name Census does not age cohorts the way it does for first names. Instead, it takes the Census Bureau's published frequency for Treworgy (0.04 per 100,000) and applies that rate to the current U.S. resident population to estimate how many living Americans have the surname today.
How common is the surname Treworgy?
Want to know how many people are called Treworgy? HowManyOfMe.org, our sister site, puts the living-bearer count front and centre.