2010
#158,432
National surname rank
Recorded bearers 102
First available Census row
Per 100,000 0.03
Very Rare Last name
Sigillo
An Italian surname derived from the Latin word "sigillum" meaning seal or stamp.
According to the 2020 US Census Bureau surname tables, roughly 114 Americans carry the last name Sigillo. That puts it at #156,005 in the national surname ranking, appearing at a frequency of 0.03 per 100,000 people (about 1 in 3,006,617 residents).
This page is the full Name Census profile for the Sigillo 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
114
1 in 3,006,617
Census rank
#156,005
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
99
very rare in the US
Popularity narrative
The Census Bureau recorded 99 bearers of the surname Sigillo in its 2020 decennial surname file. At a rate of 0.03 per 100,000 residents, it holds the 156005th position in the national surname ranking.
Among Census respondents with the surname Sigillo, the largest self-reported group is White at 86.9%. The next largest groups are Two or More Races (5.1%) and Hispanic (4.0%).
Origin
Meaning and origin of Sigillo
The surname Sigillo is of Italian origin, with its roots dating back to the medieval period in the regions of Tuscany and Umbria. The name is derived from the Latin word "sigillum," which translates to "seal" or "stamp," suggesting that the earliest bearers of this name may have been involved in the craft of seal-making or had some association with official documents and seals.
One of the earliest recorded instances of the Sigillo surname can be found in the Florentine archives from the 13th century, where a certain Guido di Sigillo was mentioned as a prominent citizen of Florence. This suggests that the name was already established in the region during that time.
In the 14th century, the Sigillo family held influential positions in the city of Perugia, located in the Umbria region of central Italy. Historical records indicate that a Niccolò Sigillo served as a magistrate and played a crucial role in the city's governance during the turbulent times of the Italian Renaissance.
The Sigillo name also appears in several historical documents from the 15th century, including the archives of the Republic of Venice. One notable figure from this period was Giacomo Sigillo, a skilled artisan and craftsman who worked on the construction of the iconic St. Mark's Basilica in Venice.
During the 16th century, the Sigillo family extended its influence to other parts of Italy, with several members achieving notable positions in the Catholic Church. One such figure was Cardinal Giovanni Battista Sigillo (1522-1597), who served as a papal legate and was highly regarded for his diplomatic skills.
Another prominent individual with the Sigillo surname was Girolamo Sigillo (1568-1641), a renowned scholar and philosopher who taught at the University of Padua. His works on metaphysics and natural philosophy were widely studied and influenced the intellectual discourse of his time.
As the centuries passed, the Sigillo name continued to be associated with various professions and endeavors, from artists and architects to lawyers and academics. While the surname may have originated from a specific craft or occupation, it has since become a part of Italy's rich cultural heritage, with its bearers contributing to the nation's history in diverse fields.
Demographics
Ancestry and ethnicity for Sigillo
Among Census respondents with the surname Sigillo, the largest self-reported group is White at 86.9%. The next largest groups are Two or More Races (5.1%) and Hispanic (4.0%).
The bar chart below shows how Sigillo 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 Sigillo surname at the time of the 2020 Census, not any inherent property of the name itself.
- White86.9% · 86
- Two or more races5.1% · 5
- Hispanic or Latino4.0% · 4
- Asian and Pacific Islander3.0% · 3
- Black or African American1.0% · 1
Timeline
Historical Census data for Sigillo
Sigillo 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
#156,005
National surname rank
Recorded bearers 99
-3 bearers (-2.9%)
Per 100,000 0.03
Rank movement Up 2,427 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #158,432 | 102 | 0.03 | First available Census row | First available Census row |
| 2020 | #156,005 | 99 | 0.03 | -3 bearers (-2.9%) | Up 2,427 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 Sigillo 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 | #158,432 | #156,005 | 1.5% |
| Count | 102 | 99 | -2.9% |
| Per 100K | 0.03 | 0.03 | 10.4% |
Between the 2010 and 2020 Census, the number of Sigillo bearers went from 102 to 99 (-2.9% change). The surname moved up 2,427 positions in the national ranking, going from #158,432 to #156,005.
FAQ
Sigillo surname: questions and answers
How many people in the U.S. have the surname Sigillo?
Name Census estimates that about 114 living Americans carry the surname Sigillo. Using the current population baseline, that works out to roughly 1 in 3,006,617 residents.
How common is Sigillo?
Sigillo ranks #156,005 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 99 people with the surname Sigillo. That is different from the site's living-bearer estimate (114), 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 Sigillo.
Has Sigillo become more or less common over time?
Between 2010 and 2020, the surname Sigillo went from 102 recorded bearers to 99. That is a decrease of 3 (-2.9%). In the national ranking it rose from #158,432 to #156,005.
What does the Census say about the background of Sigillo?
Among Census respondents with the surname Sigillo, the largest self-reported group is White at 86.9%. The next largest groups are Two or More Races (5.1%) and Hispanic (4.0%). 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 Sigillo in the 2020 Census, accounting for 86.9% (86 people in the source table).
What is the full ancestry breakdown?
Sigillo appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (86.9%), Two or More Races (5.1%), Hispanic (4.0%). 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 Sigillo (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 Sigillo mean?
An Italian surname derived from the Latin word "sigillum" meaning seal or stamp. 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 Sigillo (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 Sigillo?
For a quick modern take, check how many people have the surname Sigillo on our sister site HowManyOfMe.org.