2010
#159,712
National surname rank
Recorded bearers 101
First available Census row
Per 100,000 0.03
Very Rare Last name
Disidoro
An Italian surname derived from the personal name "Isidoro".
According to the 2020 US Census Bureau surname tables, roughly 117 Americans carry the last name Disidoro. That puts it at #154,755 in the national surname ranking, appearing at a frequency of 0.03 per 100,000 people (about 1 in 2,929,524 residents).
This page is the full Name Census profile for the Disidoro 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
117
1 in 2,929,524
Census rank
#154,755
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
102
very rare in the US
Popularity narrative
The Census Bureau recorded 102 bearers of the surname Disidoro in its 2020 decennial surname file. At a rate of 0.03 per 100,000 residents, it holds the 154755th position in the national surname ranking.
Among Census respondents with the surname Disidoro, the largest self-reported group is White at 96.1%. The next largest groups are Two or More Races (2.0%) and Black (1.0%).
Origin
Meaning and origin of Disidoro
The surname DISIDORO is of Italian origin, originating from the regions of Campania and Calabria in southern Italy. It is believed to have derived from the Latin phrase "dies idus," meaning "the ides" or the middle day of the month in the ancient Roman calendar. This suggests that the name may have originally referred to someone born or associated with a significant event on the ides.
One of the earliest recorded instances of the surname DISIDORO can be traced back to the 13th century, when it appeared in various documents and records from the town of Salerno, located in the Campania region. During this time, the name was often spelled as "D'Isidoro" or "De Isidoro," reflecting the common practice of using the prepositions "di" or "de" before surnames to indicate lineage or place of origin.
In the 15th century, a notable figure bearing the name DISIDORO was Girolamo Disidoro, a scholar and humanist from Naples. Born in 1440, Girolamo was known for his contributions to the study of classical literature and his translations of ancient Greek texts into Latin.
Another historical figure associated with the surname DISIDORO was Antonio Disidoro, a painter from Calabria who lived during the 16th century. Antonio's works, primarily religious paintings and frescoes, can still be found in various churches and monasteries throughout southern Italy.
In the 18th century, the DISIDORO surname gained prominence in the town of Monteleone (now known as Vibo Valentia) in Calabria. One notable individual from this period was Giuseppe Disidoro, a prominent lawyer and judge who served in the local court system. Giuseppe's son, Francesco Disidoro, followed in his father's footsteps and became a respected jurist in his own right.
Moving into the 19th century, the DISIDORO surname spread beyond Italy, with some bearers of the name emigrating to other parts of the world. One such individual was Vincenzo Disidoro, an Italian-American entrepreneur who established a successful wine import business in New York City in the late 1800s.
Throughout its history, the DISIDORO surname has maintained a strong presence in southern Italy, particularly in the regions of Campania and Calabria. While not as widespread as some other Italian surnames, it has left an indelible mark on the cultural and historical fabric of these regions, with numerous individuals bearing the name making significant contributions in various fields over the centuries.
Demographics
Ancestry and ethnicity for Disidoro
Among Census respondents with the surname Disidoro, the largest self-reported group is White at 96.1%. The next largest groups are Two or More Races (2.0%) and Black (1.0%).
The bar chart below shows how Disidoro 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 Disidoro surname at the time of the 2020 Census, not any inherent property of the name itself.
- White96.1% · 98
- Two or more races2.0% · 2
- Black or African American1.0% · 1
- Asian and Pacific Islander1.0% · 1
Timeline
Historical Census data for Disidoro
Disidoro 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
#154,755
National surname rank
Recorded bearers 102
+1 bearers (+1.0%)
Per 100,000 0.03
Rank movement Up 4,957 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #159,712 | 101 | 0.03 | First available Census row | First available Census row |
| 2020 | #154,755 | 102 | 0.03 | +1 bearers (+1.0%) | Up 4,957 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 Disidoro 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 | #159,712 | #154,755 | 3.1% |
| Count | 101 | 102 | 1.0% |
| Per 100K | 0.03 | 0.03 | 13.8% |
Between the 2010 and 2020 Census, the number of Disidoro bearers went from 101 to 102 (+1.0% change). The surname moved up 4,957 positions in the national ranking, going from #159,712 to #154,755.
FAQ
Disidoro surname: questions and answers
How many people in the U.S. have the surname Disidoro?
Name Census estimates that about 117 living Americans carry the surname Disidoro. Using the current population baseline, that works out to roughly 1 in 2,929,524 residents.
How common is Disidoro?
Disidoro ranks #154,755 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.03 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 102 people with the surname Disidoro. That is different from the site's living-bearer estimate (117), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.03 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.03 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 Disidoro.
Has Disidoro become more or less common over time?
Between 2010 and 2020, the surname Disidoro went from 101 recorded bearers to 102. That is an increase of 1 (+1.0%). In the national ranking it rose from #159,712 to #154,755.
What does the Census say about the background of Disidoro?
Among Census respondents with the surname Disidoro, the largest self-reported group is White at 96.1%. The next largest groups are Two or More Races (2.0%) and Black (1.0%). 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 Disidoro in the 2020 Census, accounting for 96.1% (98 people in the source table).
What is the full ancestry breakdown?
Disidoro appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (96.1%), Two or More Races (2.0%), Black (1.0%). 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 Disidoro (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 Disidoro mean?
An Italian surname derived from the personal name "Isidoro". 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 Disidoro (0.03 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 Disidoro?
You can see how common the surname Disidoro is on our sister site HowManyOfMe.org — same data roots, lighter UI.