2000
#126,400
National surname rank
Recorded bearers 125
First available Census row
Per 100,000 0.05
Very Rare Last name
Pazzaglia
An Italian toponymic surname referring to someone from a settlement named Pazzaglia.
According to the 2020 US Census Bureau surname tables, roughly 134 Americans carry the last name Pazzaglia. That puts it at #144,270 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,557,868 residents).
This page is the full Name Census profile for the Pazzaglia 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
134
1 in 2,557,868
Census rank
#144,270
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
117
very rare in the US
Popularity narrative
The Census Bureau recorded 117 bearers of the surname Pazzaglia in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 144270th position in the national surname ranking.
Among Census respondents with the surname Pazzaglia, the largest self-reported group is White at 98.3%. The next largest groups are Two or More Races (1.7%).
Origin
Meaning and origin of Pazzaglia
The surname Pazzaglia is of Italian origin, specifically from the region of Emilia-Romagna. It is believed to have originated in the 13th or 14th century. The name is derived from the Italian word "pazzo," meaning "crazy" or "foolish," and the suffix "-aglia," which can indicate a group or collection. Thus, the surname Pazzaglia may have initially referred to a family or group of people considered eccentric or unconventional.
One of the earliest recorded instances of the name can be found in the historic town of Ferrara, dating back to the late 14th century. In a document from 1387, a certain Jacopo Pazzaglia is mentioned as a landowner in the area. This suggests that the family had already achieved a certain level of prominence and wealth by that time.
In the 16th century, a notable figure with the surname Pazzaglia was Antonio Pazzaglia (1515-1589), a renowned painter from Bologna. He was known for his religious works and frescoes adorning churches in the region. His son, Girolamo Pazzaglia (1550-1621), followed in his footsteps and became a respected artist in his own right.
During the 17th century, the Pazzaglia family appeared to have expanded their influence. In a chronicle from 1632, a merchant named Francesco Pazzaglia is recorded as having established trade routes between Emilia-Romagna and neighboring regions, contributing to the area's economic growth.
Another notable individual with the surname Pazzaglia was Vincenzo Pazzaglia (1718-1792), a military officer who served in the Papal States' army during the 18th century. He rose through the ranks and was ultimately appointed as the commander of the Papal Guard, a prestigious position at the time.
In the 19th century, the Pazzaglia family produced several scholars and academics. One such figure was Giuseppe Pazzaglia (1823-1902), a professor of philosophy at the University of Bologna. He was widely respected for his work in the field of metaphysics and ethics.
While the surname Pazzaglia is not as common today as it once was, it remains a part of Italy's rich cultural heritage, with its origins deeply rooted in the history of the Emilia-Romagna region. The name has been carried by artists, merchants, military officers, and scholars throughout the centuries, contributing to the diverse tapestry of Italian society.
Demographics
Ancestry and ethnicity for Pazzaglia
Among Census respondents with the surname Pazzaglia, the largest self-reported group is White at 98.3%. The next largest groups are Two or More Races (1.7%).
The bar chart below shows how Pazzaglia 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 Pazzaglia surname at the time of the 2020 Census, not any inherent property of the name itself.
- White98.3% · 115
- Two or more races1.7% · 2
Timeline
Historical Census data for Pazzaglia
Pazzaglia 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
#142,108
National surname rank
Recorded bearers 117
-8 bearers (-6.4%)
Per 100,000 0.04
Rank movement Down 15,708 places
2020
#144,270
National surname rank
Recorded bearers 117
+0 bearers (+0.0%)
Per 100,000 0.04
Rank movement Down 2,162 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #126,400 | 125 | 0.05 | First available Census row | First available Census row |
| 2010 | #142,108 | 117 | 0.04 | -8 bearers (-6.4%) | Down 15,708 places |
| 2020 | #144,270 | 117 | 0.04 | +0 bearers (+0.0%) | Down 2,162 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 Pazzaglia 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 | #142,108 | #144,270 | -1.5% |
| Count | 117 | 117 | 0.0% |
| Per 100K | 0.04 | 0.04 | -2.1% |
Between the 2010 and 2020 Census, the number of Pazzaglia bearers went from 117 to 117 (+0.0% change). The surname moved down 2,162 positions in the national ranking, going from #142,108 to #144,270.
FAQ
Pazzaglia surname: questions and answers
How many people in the U.S. have the surname Pazzaglia?
Name Census estimates that about 134 living Americans carry the surname Pazzaglia. Using the current population baseline, that works out to roughly 1 in 2,557,868 residents.
How common is Pazzaglia?
Pazzaglia ranks #144,270 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 117 people with the surname Pazzaglia. That is different from the site's living-bearer estimate (134), 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 Pazzaglia.
Has Pazzaglia become more or less common over time?
Between 2010 and 2020, the surname Pazzaglia went from 117 recorded bearers to 117. That is an increase of 0 (+0.0%). In the national ranking it fell from #142,108 to #144,270.
What does the Census say about the background of Pazzaglia?
Among Census respondents with the surname Pazzaglia, the largest self-reported group is White at 98.3%. The next largest groups are Two or More Races (1.7%). 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 Pazzaglia in the 2020 Census, accounting for 98.3% (115 people in the source table).
What is the full ancestry breakdown?
Pazzaglia appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (98.3%), Two or More Races (1.7%). 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 Pazzaglia (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 Pazzaglia mean?
An Italian toponymic surname referring to someone from a settlement named Pazzaglia. 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 Pazzaglia (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 are called Pazzaglia?
Find out how many people have the last name Pazzaglia on our sister site HowManyOfMe.org — a quick modern estimate with the living-bearer count front and centre.