2010
#147,253
National surname rank
Recorded bearers 112
First available Census row
Per 100,000 0.04
Very Rare Last name
Dilosa
A surname of unknown origin potentially derived from dialectal Italian words.
According to the 2020 US Census Bureau surname tables, roughly 128 Americans carry the last name Dilosa. That puts it at #147,954 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,677,768 residents).
This page is the full Name Census profile for the Dilosa 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
128
1 in 2,677,768
Census rank
#147,954
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
112
very rare in the US
Popularity narrative
The Census Bureau recorded 112 bearers of the surname Dilosa in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 147954th position in the national surname ranking.
Among Census respondents with the surname Dilosa, the largest self-reported group is Black at 75.9%. The next largest groups are White (12.5%) and Two or More Races (4.5%).
Origin
Meaning and origin of Dilosa
The surname DILOSA has its origins in Italy, specifically in the regions of Sicily and Calabria. It is believed to have emerged during the 13th century, when surnames became more widely adopted across Europe.
One of the earliest known bearers of the name is Marco DILOSA, a nobleman from Catania, Sicily, who lived in the late 14th century. His name appears in several historical records of the time, including a land deed dated 1387.
The name DILOSA is thought to derive from the Latin phrase "de illosa", which translates to "from the wooded area". This suggests that the name's earliest bearers may have resided in or near a forested region.
In the 15th century, a branch of the DILOSA family settled in the town of Reggio Calabria, located in the southern tip of the Italian peninsula. Records from this period show a Giovanna DILOSA, born in 1456, who married into a prominent local family.
During the Renaissance period, the DILOSA name gained some prominence in the arts. Notably, Tommaso DILOSA (1520-1591) was a renowned painter from Palermo, Sicily, known for his religious works and portraits of the nobility.
As the DILOSA family spread throughout Italy, various spelling variations emerged, such as DI LOSA, DILOZA, and DELOSA. These variations were often influenced by regional dialects and scribal errors in historical documents.
In the 18th century, a Pietro DILOSA (1712-1789) from Naples achieved recognition as a scholar and philosopher. His treatises on ethics and metaphysics were widely read across Europe during the Age of Enlightenment.
Another notable figure bearing the DILOSA surname was Antonio DILOSA (1842-1918), a politician and lawyer from Palermo, Sicily. He served as a member of the Italian Parliament and was a vocal advocate for workers' rights and social reforms.
While the DILOSA name has remained relatively uncommon outside of Italy, it has endured as a distinct surname with deep roots in the country's history and culture.
Demographics
Ancestry and ethnicity for Dilosa
Among Census respondents with the surname Dilosa, the largest self-reported group is Black at 75.9%. The next largest groups are White (12.5%) and Two or More Races (4.5%).
The bar chart below shows how Dilosa 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 Dilosa surname at the time of the 2020 Census, not any inherent property of the name itself.
- Black or African American75.9% · 85
- White12.5% · 14
- Two or more races4.5% · 5
- Hispanic or Latino3.6% · 4
- Asian and Pacific Islander2.7% · 3
- American Indian and Alaska Native0.9% · 1
Timeline
Historical Census data for Dilosa
Dilosa appears in 2 published Census surname files: 2010, 2020. The cards below show how the name's rank and bearer count changed across each release.
2020
#147,954
National surname rank
Recorded bearers 112
+0 bearers (+0.0%)
Per 100,000 0.04
Rank movement Down 701 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #147,253 | 112 | 0.04 | First available Census row | First available Census row |
| 2020 | #147,954 | 112 | 0.04 | +0 bearers (+0.0%) | Down 701 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 Dilosa 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 | #147,253 | #147,954 | -0.5% |
| Count | 112 | 112 | 0.0% |
| Per 100K | 0.04 | 0.04 | -6.3% |
Between the 2010 and 2020 Census, the number of Dilosa bearers went from 112 to 112 (+0.0% change). The surname moved down 701 positions in the national ranking, going from #147,253 to #147,954.
FAQ
Dilosa surname: questions and answers
How many people in the U.S. have the surname Dilosa?
Name Census estimates that about 128 living Americans carry the surname Dilosa. Using the current population baseline, that works out to roughly 1 in 2,677,768 residents.
How common is Dilosa?
Dilosa ranks #147,954 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 112 people with the surname Dilosa. That is different from the site's living-bearer estimate (128), 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 Dilosa.
Has Dilosa become more or less common over time?
Between 2010 and 2020, the surname Dilosa went from 112 recorded bearers to 112. That is an increase of 0 (+0.0%). In the national ranking it fell from #147,253 to #147,954.
What does the Census say about the background of Dilosa?
Among Census respondents with the surname Dilosa, the largest self-reported group is Black at 75.9%. The next largest groups are White (12.5%) and Two or More Races (4.5%). 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?
Black is the largest self-reported group for the surname Dilosa in the 2020 Census, accounting for 75.9% (85 people in the source table).
What is the full ancestry breakdown?
Dilosa appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are Black (75.9%), White (12.5%), Two or More Races (4.5%). 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 Dilosa (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 Dilosa mean?
A surname of unknown origin potentially derived from dialectal Italian words. 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 Dilosa (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 have the surname Dilosa?
HowManyOfMe.org, our sister site, answers that with the living-bearer count in one glance.