2000
#83,301
National surname rank
Recorded bearers 210
First available Census row
Per 100,000 0.08
Very Rare Last name
Sigismondi
A surname derived from the Italian male given name Sigismondo, a Latinized form of the German name Siegmund.
According to the 2020 US Census Bureau surname tables, roughly 222 Americans carry the last name Sigismondi. That puts it at #99,694 in the national surname ranking, appearing at a frequency of 0.06 per 100,000 people (about 1 in 1,543,938 residents).
This page is the full Name Census profile for the Sigismondi 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
222
1 in 1,543,938
Census rank
#99,694
2020 decennial data
Per 100,000
0.1
Frequency rate
Recorded bearers
194
very rare in the US
Popularity narrative
The Census Bureau recorded 194 bearers of the surname Sigismondi in its 2020 decennial surname file. At a rate of 0.06 per 100,000 residents, it holds the 99694th position in the national surname ranking.
Among Census respondents with the surname Sigismondi, the largest self-reported group is White at 90.2%. The next largest groups are Hispanic (6.7%) and Black (1.5%).
Origin
Meaning and origin of Sigismondi
The surname SIGISMONDI is of Italian origin, specifically from the regions of Tuscany and Umbria. It is believed to have derived from the medieval personal name Sigismondo, which itself comes from the Germanic name Siegmund, composed of the elements "sigu" meaning victory and "mund" meaning protection.
The earliest recorded instances of the SIGISMONDI surname date back to the 13th century in historical documents from the cities of Florence and Perugia. The name was sometimes spelled as Sigismundi or Segismundi in its early forms, reflecting the variations in spelling common during that era.
One of the earliest known bearers of the SIGISMONDI name was Ser Sigismondo di Rinaldo, a notary and legal scholar who lived in Florence in the late 13th century. His name appears in several legal documents and records from that time.
In the 15th century, a notable figure with the SIGISMONDI surname was Sigismondo Pandolfo Malatesta, a renowned Italian condottiero (mercenary leader) and ruler of Rimini from 1432 to 1468. He was known for his patronage of the arts and for commissioning the famous Tempio Malatestiano, a church in Rimini designed by the architect Leon Battista Alberti.
Another prominent individual with the SIGISMONDI name was Giovan Battista Sigismondi, a 17th-century Italian mathematician and astronomer. Born in Modena in 1589, he made significant contributions to the study of celestial mechanics and was a member of the prestigious Accademia dei Lincei.
In the 18th century, Giuseppe Sigismondi was a renowned painter from the town of Loreto, known for his religious works and frescoes adorning churches throughout the Marche region of Italy. He was active during the late Baroque period and his works can still be admired in various churches today.
The SIGISMONDI surname has also been associated with several notable places and place names throughout Italy. For example, the village of Sigismondo in the province of Cremona is believed to have been named after an early bearer of the SIGISMONDI name.
Throughout its history, the SIGISMONDI surname has been carried by individuals from various walks of life, including scholars, artists, military leaders, and religious figures, reflecting the rich cultural heritage of Italy and the diverse backgrounds of those who have borne this distinctive name.
Demographics
Ancestry and ethnicity for Sigismondi
Among Census respondents with the surname Sigismondi, the largest self-reported group is White at 90.2%. The next largest groups are Hispanic (6.7%) and Black (1.5%).
The bar chart below shows how Sigismondi 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 Sigismondi surname at the time of the 2020 Census, not any inherent property of the name itself.
- White90.2% · 175
- Hispanic or Latino6.7% · 13
- Black or African American1.5% · 3
- Two or more races1.0% · 2
- American Indian and Alaska Native0.5% · 1
Timeline
Historical Census data for Sigismondi
Sigismondi 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
#86,981
National surname rank
Recorded bearers 214
+4 bearers (+1.9%)
Per 100,000 0.07
Rank movement Down 3,680 places
2020
#99,694
National surname rank
Recorded bearers 194
-20 bearers (-9.3%)
Per 100,000 0.06
Rank movement Down 12,713 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #83,301 | 210 | 0.08 | First available Census row | First available Census row |
| 2010 | #86,981 | 214 | 0.07 | +4 bearers (+1.9%) | Down 3,680 places |
| 2020 | #99,694 | 194 | 0.06 | -20 bearers (-9.3%) | Down 12,713 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 Sigismondi 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 | #86,981 | #99,694 | -14.6% |
| Count | 214 | 194 | -9.3% |
| Per 100K | 0.07 | 0.06 | -7.3% |
Between the 2010 and 2020 Census, the number of Sigismondi bearers went from 214 to 194 (-9.3% change). The surname moved down 12,713 positions in the national ranking, going from #86,981 to #99,694.
FAQ
Sigismondi surname: questions and answers
How many people in the U.S. have the surname Sigismondi?
Name Census estimates that about 222 living Americans carry the surname Sigismondi. Using the current population baseline, that works out to roughly 1 in 1,543,938 residents.
How common is Sigismondi?
Sigismondi ranks #99,694 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.06 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 194 people with the surname Sigismondi. That is different from the site's living-bearer estimate (222), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.06 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.06 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 Sigismondi.
Has Sigismondi become more or less common over time?
Between 2010 and 2020, the surname Sigismondi went from 214 recorded bearers to 194. That is a decrease of 20 (-9.3%). In the national ranking it fell from #86,981 to #99,694.
What does the Census say about the background of Sigismondi?
Among Census respondents with the surname Sigismondi, the largest self-reported group is White at 90.2%. The next largest groups are Hispanic (6.7%) and Black (1.5%). 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?
White is the largest self-reported group for the surname Sigismondi in the 2020 Census, accounting for 90.2% (175 people in the source table).
What is the full ancestry breakdown?
Sigismondi appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (90.2%), Hispanic (6.7%), Black (1.5%). 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 Sigismondi (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 Sigismondi mean?
A surname derived from the Italian male given name Sigismondo, a Latinized form of the German name Siegmund. 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 Sigismondi (0.06 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 Americans have the surname Sigismondi?
HowManyOfMe.org, our sister site, answers that with the living-bearer count in one glance.