2010
#144,141
National surname rank
Recorded bearers 115
First available Census row
Per 100,000 0.04
Very Rare Last name
Iamurri
A surname derived from an Italian place name possibly related to the term "murri" meaning black rocks.
According to the 2020 US Census Bureau surname tables, roughly 122 Americans carry the last name Iamurri. That puts it at #152,339 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,809,462 residents).
This page is the full Name Census profile for the Iamurri 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
122
1 in 2,809,462
Census rank
#152,339
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
106
very rare in the US
Popularity narrative
The Census Bureau recorded 106 bearers of the surname Iamurri in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 152339th position in the national surname ranking.
Among Census respondents with the surname Iamurri, the largest self-reported group is White at 94.3%. The next largest groups are Two or More Races (2.8%) and American Indian/Alaska Native (1.9%).
Origin
Meaning and origin of Iamurri
The surname IAMURRI is of Italian origin, originating from the region of Campania in southern Italy. It is believed to have derived from the Latin word "iam" meaning "already" and "urri" which was a variation of the word "urbs" meaning "city".
This surname likely originated in the medieval period, perhaps as early as the 11th or 12th century. It may have referred to someone who had already established themselves in a particular city or town, distinguishing them from more recent arrivals.
Some of the earliest recorded instances of the surname IAMURRI can be found in historical documents from the Kingdom of Naples, such as tax records and property deeds from the 14th and 15th centuries. There are also references to individuals with this surname in various ecclesiastical and legal records from that time period.
One of the earliest known bearers of the IAMURRI surname was Girolamo IAMURRI, a merchant and landowner from the city of Salerno who lived in the late 15th century. Another notable figure was Vincenzo IAMURRI, a Neapolitan lawyer and judge who served in the court of King Ferdinand I of Naples in the early 16th century.
During the Renaissance period, the IAMURRI surname was associated with several notable artists and intellectuals. Pietro IAMURRI, born in 1499, was a renowned painter and sculptor who worked in Naples and Rome. His contemporary, Giulio IAMURRI (1510-1578), was a respected philosopher and scholar who taught at the University of Naples.
In the 17th century, the IAMURRI family produced several notable clergymen, including Tommaso IAMURRI (1605-1678), who served as the Bishop of Salerno, and his brother, Antonio IAMURRI (1612-1690), who was a prominent Jesuit theologian and author.
As the IAMURRI surname spread beyond its origins in Campania, it can also be found in historical records from other parts of Italy, such as Sicily and the northern regions. One notable bearer from this period was the Milanese architect and engineer, Giovanni IAMURRI (1720-1795), who was responsible for the design of several churches and public buildings in northern Italy.
Demographics
Ancestry and ethnicity for Iamurri
Among Census respondents with the surname Iamurri, the largest self-reported group is White at 94.3%. The next largest groups are Two or More Races (2.8%) and American Indian/Alaska Native (1.9%).
The bar chart below shows how Iamurri 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 Iamurri surname at the time of the 2020 Census, not any inherent property of the name itself.
- White94.3% · 100
- Two or more races2.8% · 3
- American Indian and Alaska Native1.9% · 2
- Hispanic or Latino0.9% · 1
Timeline
Historical Census data for Iamurri
Iamurri 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
#152,339
National surname rank
Recorded bearers 106
-9 bearers (-7.8%)
Per 100,000 0.04
Rank movement Down 8,198 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #144,141 | 115 | 0.04 | First available Census row | First available Census row |
| 2020 | #152,339 | 106 | 0.04 | -9 bearers (-7.8%) | Down 8,198 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 Iamurri 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 | #144,141 | #152,339 | -5.7% |
| Count | 115 | 106 | -7.8% |
| Per 100K | 0.04 | 0.04 | -11.3% |
Between the 2010 and 2020 Census, the number of Iamurri bearers went from 115 to 106 (-7.8% change). The surname moved down 8,198 positions in the national ranking, going from #144,141 to #152,339.
FAQ
Iamurri surname: questions and answers
How many people in the U.S. have the surname Iamurri?
Name Census estimates that about 122 living Americans carry the surname Iamurri. Using the current population baseline, that works out to roughly 1 in 2,809,462 residents.
How common is Iamurri?
Iamurri ranks #152,339 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 106 people with the surname Iamurri. That is different from the site's living-bearer estimate (122), 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 Iamurri.
Has Iamurri become more or less common over time?
Between 2010 and 2020, the surname Iamurri went from 115 recorded bearers to 106. That is a decrease of 9 (-7.8%). In the national ranking it fell from #144,141 to #152,339.
What does the Census say about the background of Iamurri?
Among Census respondents with the surname Iamurri, the largest self-reported group is White at 94.3%. The next largest groups are Two or More Races (2.8%) and American Indian/Alaska Native (1.9%). 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 Iamurri in the 2020 Census, accounting for 94.3% (100 people in the source table).
What is the full ancestry breakdown?
Iamurri appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (94.3%), Two or More Races (2.8%), American Indian/Alaska Native (1.9%). 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 Iamurri (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 Iamurri mean?
A surname derived from an Italian place name possibly related to the term "murri" meaning black rocks. 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 Iamurri (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 common is the surname Iamurri?
Our sister site HowManyOfMe.org answers how many people have the surname Iamurri at a glance, with the living-bearer count up front.