2010
#157,234
National surname rank
Recorded bearers 103
First available Census row
Per 100,000 0.03
Very Rare Last name
Clemann
A surname derived from the Germanic personal name "Kleman" or "Clemens".
According to the 2020 US Census Bureau surname tables, roughly 114 Americans carry the last name Clemann. 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 Clemann 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 Clemann 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 Clemann, the largest self-reported group is White at 82.8%. The next largest groups are Two or More Races (12.1%) and Hispanic (3.0%).
Origin
Meaning and origin of Clemann
The surname CLEMANN has its origins in England, tracing back to the late medieval period around the 13th century. It is believed to be a variation or anglicized form of the French surname 'Clément', which was derived from the Latin name 'Clemens', meaning 'mild' or 'merciful'.
This name was likely brought to England during the Norman Conquest, when many French settlers arrived and established themselves in various parts of the country. One of the earliest recorded instances of the CLEMANN spelling can be found in the Pipe Rolls of Sussex, dated 1230, where a Richard Clemann is mentioned.
In the 14th century, the surname appears in various records across different counties, including the Subsidy Rolls of Worcestershire (1327) and the Court Rolls of Wakefield, Yorkshire (1379). These early appearances suggest that the name had spread across England and was used by families of varying social statuses.
One notable bearer of the CLEMANN name was John Clemann, a merchant and alderman of London who lived in the late 15th century. He was involved in the city's government and held significant influence during his time.
In the 16th century, the CLEMANN surname can be found in the parish records of several villages, including Rotherfield in East Sussex and Ashford in Kent. This indicates that the name had become well-established in these regions.
Another noteworthy figure was Sir Thomas Clemann, a successful landowner and member of the gentry class in Hertfordshire during the late 16th and early 17th centuries. He was knighted by King James I in recognition of his service and contributions.
During the 17th century, the CLEMANN name appeared in various legal documents and records, such as the Hearth Tax Rolls of Somerset (1664) and the Protestation Returns of Essex (1641-42). This suggests that the surname had spread across different parts of England by this time.
Other notable individuals bearing the CLEMANN surname include Robert Clemann, a prominent merchant and politician in Bristol during the late 17th century, and William Clemann, a respected lawyer and judge who served in the Court of Common Pleas in the early 18th century.
Throughout its history, the CLEMANN surname has undergone various spelling variations, including Cleman, Clemman, and Clemmen, reflecting the regional dialects and changes in English language over time.
Demographics
Ancestry and ethnicity for Clemann
Among Census respondents with the surname Clemann, the largest self-reported group is White at 82.8%. The next largest groups are Two or More Races (12.1%) and Hispanic (3.0%).
The bar chart below shows how Clemann 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 Clemann surname at the time of the 2020 Census, not any inherent property of the name itself.
- White82.8% · 82
- Two or more races12.1% · 12
- Hispanic or Latino3.0% · 3
- Asian and Pacific Islander2.0% · 2
Timeline
Historical Census data for Clemann
Clemann 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
-4 bearers (-3.9%)
Per 100,000 0.03
Rank movement Up 1,229 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #157,234 | 103 | 0.03 | First available Census row | First available Census row |
| 2020 | #156,005 | 99 | 0.03 | -4 bearers (-3.9%) | Up 1,229 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 Clemann 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 | #157,234 | #156,005 | 0.8% |
| Count | 103 | 99 | -3.9% |
| Per 100K | 0.03 | 0.03 | 10.4% |
Between the 2010 and 2020 Census, the number of Clemann bearers went from 103 to 99 (-3.9% change). The surname moved up 1,229 positions in the national ranking, going from #157,234 to #156,005.
FAQ
Clemann surname: questions and answers
How many people in the U.S. have the surname Clemann?
Name Census estimates that about 114 living Americans carry the surname Clemann. Using the current population baseline, that works out to roughly 1 in 3,006,617 residents.
How common is Clemann?
Clemann 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 Clemann. 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 Clemann.
Has Clemann become more or less common over time?
Between 2010 and 2020, the surname Clemann went from 103 recorded bearers to 99. That is a decrease of 4 (-3.9%). In the national ranking it rose from #157,234 to #156,005.
What does the Census say about the background of Clemann?
Among Census respondents with the surname Clemann, the largest self-reported group is White at 82.8%. The next largest groups are Two or More Races (12.1%) and Hispanic (3.0%). 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 Clemann in the 2020 Census, accounting for 82.8% (82 people in the source table).
What is the full ancestry breakdown?
Clemann appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (82.8%), Two or More Races (12.1%), Hispanic (3.0%). 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 Clemann (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 Clemann mean?
A surname derived from the Germanic personal name "Kleman" or "Clemens". 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 Clemann (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 many Americans have the surname Clemann?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.