2010
#160,975
National surname rank
Recorded bearers 100
First available Census row
Per 100,000 0.03
Very Rare Last name
Guillebeaux
A French surname derived from a place name or possibly meaning "beautiful small valley".
According to the 2020 US Census Bureau surname tables, roughly 136 Americans carry the last name Guillebeaux. That puts it at #142,788 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,520,252 residents).
This page is the full Name Census profile for the Guillebeaux 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
136
1 in 2,520,252
Census rank
#142,788
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
119
very rare in the US
Popularity narrative
The Census Bureau recorded 119 bearers of the surname Guillebeaux in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 142788th position in the national surname ranking.
Among Census respondents with the surname Guillebeaux, the largest self-reported group is Black at 88.2%. The next largest groups are White (6.7%) and Two or More Races (4.2%).
Origin
Meaning and origin of Guillebeaux
The surname GUILLEBEAUX has its origins in France, dating back to the Middle Ages. It is believed to have originated from the French region of Poitou, which was historically a part of the Duchy of Aquitaine. The name is thought to derive from the Old French words "guille," meaning "to deceive," and "beau," meaning "beautiful" or "handsome."
One of the earliest recorded instances of the GUILLEBEAUX surname can be found in the records of the Cistercian Abbey of Fontevraud, located in the former province of Anjou, which dates back to the 12th century. The name appears to have been associated with the nearby village of Guillebeau, which may have influenced the spelling and pronunciation of the surname over time.
In the 13th century, a nobleman named Geoffroi Guillebeaux was mentioned in the "Cartulaire de l'Abbaye de Fontaine-Daniel," a collection of charters and documents related to the Benedictine abbey located in Normandy. This suggests that the GUILLEBEAUX family had established itself in various regions of northern and western France during this period.
Another notable figure bearing the GUILLEBEAUX surname was Jean Guillebeaux, who was a merchant and landowner in the town of La Rochelle during the 16th century (born circa 1520, died 1587). Records indicate that he played a significant role in the local trade and economy of the region.
During the 17th century, a member of the GUILLEBEAUX family, Pierre Guillebeaux (born circa 1635, died 1698), was a renowned physician and author who wrote several treatises on medical practices and remedies. His works were widely circulated and highly regarded within the scientific community of his time.
In the 18th century, a notable figure was Jacques Guillebeaux (born 1721, died 1798), who served as a captain in the French navy during the American Revolutionary War. He fought alongside the American colonists against the British forces and was recognized for his bravery and leadership.
Throughout its history, the GUILLEBEAUX surname has been associated with various professions and social classes, from noblemen and merchants to physicians and military officers. While the name's origins can be traced back to the Middle Ages, its legacy continues to be a part of French cultural heritage and history.
Demographics
Ancestry and ethnicity for Guillebeaux
Among Census respondents with the surname Guillebeaux, the largest self-reported group is Black at 88.2%. The next largest groups are White (6.7%) and Two or More Races (4.2%).
The bar chart below shows how Guillebeaux 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 Guillebeaux surname at the time of the 2020 Census, not any inherent property of the name itself.
- Black or African American88.2% · 105
- White6.7% · 8
- Two or more races4.2% · 5
- Asian and Pacific Islander0.8% · 1
Timeline
Historical Census data for Guillebeaux
Guillebeaux 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
#142,788
National surname rank
Recorded bearers 119
+19 bearers (+19.0%)
Per 100,000 0.04
Rank movement Up 18,187 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #160,975 | 100 | 0.03 | First available Census row | First available Census row |
| 2020 | #142,788 | 119 | 0.04 | +19 bearers (+19.0%) | Up 18,187 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 Guillebeaux 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 | #160,975 | #142,788 | 11.3% |
| Count | 100 | 119 | 19.0% |
| Per 100K | 0.03 | 0.04 | 32.7% |
Between the 2010 and 2020 Census, the number of Guillebeaux bearers went from 100 to 119 (+19.0% change). The surname moved up 18,187 positions in the national ranking, going from #160,975 to #142,788.
FAQ
Guillebeaux surname: questions and answers
How many people in the U.S. have the surname Guillebeaux?
Name Census estimates that about 136 living Americans carry the surname Guillebeaux. Using the current population baseline, that works out to roughly 1 in 2,520,252 residents.
How common is Guillebeaux?
Guillebeaux ranks #142,788 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 119 people with the surname Guillebeaux. That is different from the site's living-bearer estimate (136), 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 Guillebeaux.
Has Guillebeaux become more or less common over time?
Between 2010 and 2020, the surname Guillebeaux went from 100 recorded bearers to 119. That is an increase of 19 (+19.0%). In the national ranking it rose from #160,975 to #142,788.
What does the Census say about the background of Guillebeaux?
Among Census respondents with the surname Guillebeaux, the largest self-reported group is Black at 88.2%. The next largest groups are White (6.7%) and Two or More Races (4.2%). 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?
Black is the largest self-reported group for the surname Guillebeaux in the 2020 Census, accounting for 88.2% (105 people in the source table).
What is the full ancestry breakdown?
Guillebeaux appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are Black (88.2%), White (6.7%), Two or More Races (4.2%). 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 Guillebeaux (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 Guillebeaux mean?
A French surname derived from a place name or possibly meaning "beautiful small valley". 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 Guillebeaux (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 have the last name Guillebeaux?
Want to know how many people have the surname Guillebeaux? HowManyOfMe.org, our sister site, puts the living-bearer count front and centre.