2000
#137,816
National surname rank
Recorded bearers 112
First available Census row
Per 100,000 0.04
Very Rare Last name
Dematties
Of Italian origin, a habitational name derived from a place name.
According to the 2020 US Census Bureau surname tables, roughly 125 Americans carry the last name Dematties. That puts it at #150,205 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,742,035 residents).
This page is the full Name Census profile for the Dematties 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
125
1 in 2,742,035
Census rank
#150,205
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
109
very rare in the US
Popularity narrative
The Census Bureau recorded 109 bearers of the surname Dematties in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 150205th position in the national surname ranking.
Among Census respondents with the surname Dematties, the largest self-reported group is White at 92.7%. The next largest groups are Black (4.6%) and Two or More Races (2.8%).
Origin
Meaning and origin of Dematties
The surname DEMATTIES has its origins in Italy, specifically in the northern regions of the country. It is believed to have emerged during the 13th and 14th centuries, a period when surnames were becoming more commonly adopted in Europe.
One theory suggests that the name DEMATTIES is derived from the Italian word "mattia," which means "foolish" or "silly." It is possible that the name was originally bestowed upon an individual with a comical or eccentric personality. Another interpretation links the name to the Italian male given name Mattia, a variant of Matthew, suggesting that DEMATTIES may have been a patronymic surname.
In the 15th century, records from the city of Genoa mention a merchant named Giovanni DEMATTIES, who traded in spices and textiles with the Mediterranean regions. This is one of the earliest documented instances of the surname in written records.
The name DEMATTIES can also be traced back to the town of Mattie in the Piedmont region of northwestern Italy. It is believed that the surname may have originated from this place name, with the prefix "de" indicating a connection to the locality.
During the 17th century, a notable figure bearing the surname DEMATTIES was Antonio DEMATTIES, a renowned painter from Milan. He was known for his religious works and frescoes adorning several churches in the city. Antonio DEMATTIES was born in 1602 and passed away in 1678.
Another prominent individual with this surname was Giorgio DEMATTIES, a philosopher and scholar who lived in the 18th century. He was born in Venice in 1712 and dedicated his life to the study of ancient Greek and Roman texts, contributing to the advancement of classical studies during the Enlightenment period.
In the 19th century, the name DEMATTIES gained recognition through the achievements of Giulia DEMATTIES, a pioneering Italian educator. She established one of the first schools for girls in the city of Turin, paving the way for increased educational opportunities for women. Giulia DEMATTIES lived from 1808 to 1892.
Towards the end of the 19th century, the DEMATTIES surname made its way to the United States, as Italian immigrants sought new opportunities in the rapidly industrializing nation. One notable figure from this period was Francesco DEMATTIES, a sculptor who immigrated to New York City in the 1880s. His works were exhibited in several art galleries and museums across the eastern United States.
Throughout its rich history, the surname DEMATTIES has been associated with individuals from various walks of life, including merchants, artists, scholars, and educators, reflecting the diverse backgrounds and contributions of those who have carried this name over the centuries.
Demographics
Ancestry and ethnicity for Dematties
Among Census respondents with the surname Dematties, the largest self-reported group is White at 92.7%. The next largest groups are Black (4.6%) and Two or More Races (2.8%).
The bar chart below shows how Dematties 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 Dematties surname at the time of the 2020 Census, not any inherent property of the name itself.
- White92.7% · 101
- Black or African American4.6% · 5
- Two or more races2.8% · 3
Timeline
Historical Census data for Dematties
Dematties 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
#150,452
National surname rank
Recorded bearers 109
-3 bearers (-2.7%)
Per 100,000 0.04
Rank movement Down 12,636 places
2020
#150,205
National surname rank
Recorded bearers 109
+0 bearers (+0.0%)
Per 100,000 0.04
Rank movement Up 247 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #137,816 | 112 | 0.04 | First available Census row | First available Census row |
| 2010 | #150,452 | 109 | 0.04 | -3 bearers (-2.7%) | Down 12,636 places |
| 2020 | #150,205 | 109 | 0.04 | +0 bearers (+0.0%) | Up 247 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 Dematties 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 | #150,452 | #150,205 | 0.2% |
| Count | 109 | 109 | 0.0% |
| Per 100K | 0.04 | 0.04 | -8.8% |
Between the 2010 and 2020 Census, the number of Dematties bearers went from 109 to 109 (+0.0% change). The surname moved up 247 positions in the national ranking, going from #150,452 to #150,205.
FAQ
Dematties surname: questions and answers
How many people in the U.S. have the surname Dematties?
Name Census estimates that about 125 living Americans carry the surname Dematties. Using the current population baseline, that works out to roughly 1 in 2,742,035 residents.
How common is Dematties?
Dematties ranks #150,205 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 109 people with the surname Dematties. That is different from the site's living-bearer estimate (125), 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 Dematties.
Has Dematties become more or less common over time?
Between 2010 and 2020, the surname Dematties went from 109 recorded bearers to 109. That is an increase of 0 (+0.0%). In the national ranking it rose from #150,452 to #150,205.
What does the Census say about the background of Dematties?
Among Census respondents with the surname Dematties, the largest self-reported group is White at 92.7%. The next largest groups are Black (4.6%) and Two or More Races (2.8%). 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 Dematties in the 2020 Census, accounting for 92.7% (101 people in the source table).
What is the full ancestry breakdown?
Dematties appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (92.7%), Black (4.6%), Two or More Races (2.8%). 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 Dematties (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 Dematties mean?
Of Italian origin, a habitational name derived from a place name. 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 Dematties (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 many people share the surname Dematties?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.