2000
#143,847
National surname rank
Recorded bearers 106
First available Census row
Per 100,000 0.04
Very Rare Last name
Sincerbeaux
A surname derived from French, possibly meaning "beautiful" and "sincere."
According to the 2020 US Census Bureau surname tables, roughly 117 Americans carry the last name Sincerbeaux. That puts it at #154,755 in the national surname ranking, appearing at a frequency of 0.03 per 100,000 people (about 1 in 2,929,524 residents).
This page is the full Name Census profile for the Sincerbeaux 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
117
1 in 2,929,524
Census rank
#154,755
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
102
very rare in the US
Popularity narrative
The Census Bureau recorded 102 bearers of the surname Sincerbeaux in its 2020 decennial surname file. At a rate of 0.03 per 100,000 residents, it holds the 154755th position in the national surname ranking.
Among Census respondents with the surname Sincerbeaux, the largest self-reported group is White at 100.0%.
Origin
Meaning and origin of Sincerbeaux
The surname SINCERBEAUX has its origins in the northern regions of France, tracing back to the 13th century. It is believed to have derived from a combination of the Old French words "sincere" and "beau," meaning "sincere" and "beautiful," respectively. This amalgamation suggests that the name may have been initially given as a descriptive surname, referring to an individual with a sincere and attractive demeanor.
One of the earliest recorded instances of the name can be found in the archives of the Abbaye de Saint-Riquier, a Benedictine monastery located in Picardy, France. The records mention a certain Jean SINCERBEAUX, who served as a scribe in the abbey during the late 1200s. This entry provides tangible evidence of the name's existence and usage during that period.
In the 14th century, the name SINCERBEAUX appeared in several municipal records of the city of Amiens, also located in the Picardy region. These records document various individuals bearing the surname, suggesting that the name had become established within the local community by that time.
During the 16th century, a notable figure named Pierre SINCERBEAUX (1529-1587) gained recognition as a skilled mathematician and astronomer. He authored several influential works on celestial navigation and was appointed as the Royal Mathematician to King Henry III of France.
Another prominent individual was Marguerite SINCERBEAUX (1675-1743), a renowned lace maker from the town of Valenciennes. Her intricate and exquisite lace designs were highly sought after by the nobility and affluent classes throughout Europe.
In the 18th century, Jacques SINCERBEAUX (1721-1798) made a name for himself as a successful merchant and trader, establishing a thriving business network across the northern regions of France and the Low Countries. His entrepreneurial endeavors contributed significantly to the economic prosperity of the region.
A century later, Alexandre SINCERBEAUX (1819-1892) emerged as a prominent figure in the field of horticulture. He developed several new varieties of roses and established a renowned nursery in the town of Angers, which became a hub for the cultivation and distribution of ornamental plants.
While the name SINCERBEAUX may have experienced some variations in spelling over the centuries, such as Sincerbeau or Sinserbo, its core elements have remained relatively consistent, reflecting its French origins and the qualities it was meant to convey.
Demographics
Ancestry and ethnicity for Sincerbeaux
Among Census respondents with the surname Sincerbeaux, the largest self-reported group is White at 100.0%.
The bar chart below shows how Sincerbeaux 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 Sincerbeaux surname at the time of the 2020 Census, not any inherent property of the name itself.
- White100.0% · 102
Timeline
Historical Census data for Sincerbeaux
Sincerbeaux 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
#154,907
National surname rank
Recorded bearers 105
-1 bearers (-0.9%)
Per 100,000 0.04
Rank movement Down 11,060 places
2020
#154,755
National surname rank
Recorded bearers 102
-3 bearers (-2.9%)
Per 100,000 0.03
Rank movement Up 152 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #143,847 | 106 | 0.04 | First available Census row | First available Census row |
| 2010 | #154,907 | 105 | 0.04 | -1 bearers (-0.9%) | Down 11,060 places |
| 2020 | #154,755 | 102 | 0.03 | -3 bearers (-2.9%) | Up 152 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 Sincerbeaux 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 | #154,907 | #154,755 | 0.1% |
| Count | 105 | 102 | -2.9% |
| Per 100K | 0.04 | 0.03 | -14.7% |
Between the 2010 and 2020 Census, the number of Sincerbeaux bearers went from 105 to 102 (-2.9% change). The surname moved up 152 positions in the national ranking, going from #154,907 to #154,755.
FAQ
Sincerbeaux surname: questions and answers
How many people in the U.S. have the surname Sincerbeaux?
Name Census estimates that about 117 living Americans carry the surname Sincerbeaux. Using the current population baseline, that works out to roughly 1 in 2,929,524 residents.
How common is Sincerbeaux?
Sincerbeaux ranks #154,755 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 102 people with the surname Sincerbeaux. That is different from the site's living-bearer estimate (117), 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 Sincerbeaux.
Has Sincerbeaux become more or less common over time?
Between 2010 and 2020, the surname Sincerbeaux went from 105 recorded bearers to 102. That is a decrease of 3 (-2.9%). In the national ranking it rose from #154,907 to #154,755.
What does the Census say about the background of Sincerbeaux?
Among Census respondents with the surname Sincerbeaux, the largest self-reported group is White at 100.0%. 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 Sincerbeaux in the 2020 Census, accounting for 100.0% (102 people in the source table).
What is the full ancestry breakdown?
Sincerbeaux appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (100.0%). 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 Sincerbeaux (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 Sincerbeaux mean?
A surname derived from French, possibly meaning "beautiful" and "sincere." 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 Sincerbeaux (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 common is the surname Sincerbeaux?
For a quick modern take, check how many people are called Sincerbeaux on our sister site HowManyOfMe.org.