2000
#126,400
National surname rank
Recorded bearers 125
First available Census row
Per 100,000 0.05
Very Rare Last name
Pierorazio
An Italian surname possibly derived from the personal name "Piero" combined with a placename or occupation.
According to the 2020 US Census Bureau surname tables, roughly 126 Americans carry the last name Pierorazio. That puts it at #149,446 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,720,273 residents).
This page is the full Name Census profile for the Pierorazio 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
126
1 in 2,720,273
Census rank
#149,446
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
110
very rare in the US
Popularity narrative
The Census Bureau recorded 110 bearers of the surname Pierorazio in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 149446th position in the national surname ranking.
Among Census respondents with the surname Pierorazio, the largest self-reported group is White at 96.4%. The next largest groups are Asian/Pacific Islander (1.8%) and Hispanic (0.9%).
Origin
Meaning and origin of Pierorazio
The surname PIERORAZIO originates from Italy, specifically from the regions of Lazio and Abruzzo. It is believed to have emerged during the medieval period, around the 11th or 12th century.
The name PIERORAZIO is derived from the Italian personal name "Piero," which is a variation of the name "Pietro," the Italian form of "Peter." The suffix "-razio" is thought to be a patronymic ending, indicating that the name was originally a combination of the personal name Piero and the Latin word "ratio," meaning "son of."
One of the earliest recorded instances of the surname PIERORAZIO can be found in a document from the town of Sora, in the province of Frosinone, Lazio, dated back to the late 13th century. This document mentions a certain "Pieroratio de Sora," suggesting that the name was already in use in that region at that time.
In the 15th century, a notable figure bearing the name PIERORAZIO was Pierorazio Borghese, a wealthy merchant and landowner from the town of Rieti, in the region of Lazio. He was known for his involvement in local politics and his philanthropic activities.
Another prominent individual with the surname PIERORAZIO was Giovanni Pierorazio, a Renaissance painter and architect born in Viterbo, Lazio, in 1490. He is best known for his frescoes in several churches in Rome and his contributions to the design of the Palazzo Farnese.
During the 16th century, the PIERORAZIO family established a presence in the town of Giulianova, in the Abruzzo region. One of the earliest members of this branch was Pierorazio di Giulianova, a respected lawyer and judge who lived from 1523 to 1598.
In the 18th century, Pietro Paolo PIERORAZIO (1701-1778) was a notable scholar and writer from the town of Sulmona, in Abruzzo. He authored several works on history, literature, and philosophy, and was a member of the prestigious Accademia dell'Arcadia in Rome.
Over the centuries, variations of the spelling of the surname PIERORAZIO have emerged, such as Piero Razio, Piero Razi, and Piero Razi. These variations are often found in historical documents from different regions of Italy, reflecting the local dialects and linguistic variations.
Demographics
Ancestry and ethnicity for Pierorazio
Among Census respondents with the surname Pierorazio, the largest self-reported group is White at 96.4%. The next largest groups are Asian/Pacific Islander (1.8%) and Hispanic (0.9%).
The bar chart below shows how Pierorazio 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 Pierorazio surname at the time of the 2020 Census, not any inherent property of the name itself.
- White96.4% · 106
- Asian and Pacific Islander1.8% · 2
- Hispanic or Latino0.9% · 1
- Two or more races0.9% · 1
Timeline
Historical Census data for Pierorazio
Pierorazio 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
#152,628
National surname rank
Recorded bearers 107
-18 bearers (-14.4%)
Per 100,000 0.04
Rank movement Down 26,228 places
2020
#149,446
National surname rank
Recorded bearers 110
+3 bearers (+2.8%)
Per 100,000 0.04
Rank movement Up 3,182 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 | #152,628 | 107 | 0.04 | -18 bearers (-14.4%) | Down 26,228 places |
| 2020 | #149,446 | 110 | 0.04 | +3 bearers (+2.8%) | Up 3,182 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 Pierorazio 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 | #152,628 | #149,446 | 2.1% |
| Count | 107 | 110 | 2.8% |
| Per 100K | 0.04 | 0.04 | -8.0% |
Between the 2010 and 2020 Census, the number of Pierorazio bearers went from 107 to 110 (+2.8% change). The surname moved up 3,182 positions in the national ranking, going from #152,628 to #149,446.
FAQ
Pierorazio surname: questions and answers
How many people in the U.S. have the surname Pierorazio?
Name Census estimates that about 126 living Americans carry the surname Pierorazio. Using the current population baseline, that works out to roughly 1 in 2,720,273 residents.
How common is Pierorazio?
Pierorazio ranks #149,446 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 110 people with the surname Pierorazio. That is different from the site's living-bearer estimate (126), 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 Pierorazio.
Has Pierorazio become more or less common over time?
Between 2010 and 2020, the surname Pierorazio went from 107 recorded bearers to 110. That is an increase of 3 (+2.8%). In the national ranking it rose from #152,628 to #149,446.
What does the Census say about the background of Pierorazio?
Among Census respondents with the surname Pierorazio, the largest self-reported group is White at 96.4%. The next largest groups are Asian/Pacific Islander (1.8%) and Hispanic (0.9%). 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 Pierorazio in the 2020 Census, accounting for 96.4% (106 people in the source table).
What is the full ancestry breakdown?
Pierorazio appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (96.4%), Asian/Pacific Islander (1.8%), Hispanic (0.9%). 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 Pierorazio (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 Pierorazio mean?
An Italian surname possibly derived from the personal name "Piero" combined with a placename or occupation. 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 Pierorazio (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 share the surname Pierorazio?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.