2000
#148,244
National surname rank
Recorded bearers 102
First available Census row
Per 100,000 0.04
Very Rare Last name
Lambart
A surname derived from the Germanic personal name Lambert, meaning "bright land".
According to the 2020 US Census Bureau surname tables, roughly 120 Americans carry the last name Lambart. That puts it at #152,989 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,856,286 residents).
This page is the full Name Census profile for the Lambart 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
120
1 in 2,856,286
Census rank
#152,989
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
105
very rare in the US
Popularity narrative
The Census Bureau recorded 105 bearers of the surname Lambart in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 152989th position in the national surname ranking.
Among Census respondents with the surname Lambart, the largest self-reported group is White at 86.7%. The next largest groups are Black (10.5%) and Two or More Races (1.9%).
Origin
Meaning and origin of Lambart
The surname Lambart originated in France during the medieval period. It is a variant spelling of the French name Lambert, which is derived from the Germanic personal name Landbehrt, composed of the elements "land" meaning territory and "behrt" meaning bright or illustrious. The name likely referred to someone who owned or controlled a significant amount of land.
The earliest known record of the surname Lambart appears in the Domesday Book of 1086, a survey of landowners in England commissioned by William the Conquer. The name is listed as Lambard, one of the many spelling variations that emerged over time.
In the 12th century, a notable bearer of the name was Walter Lambart, a Norman knight who accompanied King Richard I on the Third Crusade to the Holy Land. He is mentioned in historical accounts of the siege of Acre in 1191.
During the 13th century, the name Lambart was associated with the village of Lambart in Normandy, France. This place name likely influenced the spelling and pronunciation of the surname in that region.
In the 14th century, Sir John Lambart (1285-1346) was a prominent English knight who served under King Edward III during the Hundred Years' War. He fought in the Battle of Crécy in 1346 and was knighted for his bravery on the battlefield.
In the 16th century, the Lambart family established themselves as landed gentry in County Cavan, Ireland. Charles Lambart (1558-1637) was granted the title of Earl of Cavan in 1647, and his descendants continued to hold this title for several generations.
Another notable bearer of the Lambart name was Johann Lambart (1629-1682), an Austrian Field Marshal who played a significant role in the Great Turkish War of the late 17th century. He commanded Imperial forces in the Battle of Saint Gotthard in 1664 and the Battle of Mogersdorf in 1673.
Throughout history, the surname Lambart has been spelled in various ways, including Lambert, Lambard, Lambart, and Lamberte, reflecting regional variations and the evolution of language over time.
Demographics
Ancestry and ethnicity for Lambart
Among Census respondents with the surname Lambart, the largest self-reported group is White at 86.7%. The next largest groups are Black (10.5%) and Two or More Races (1.9%).
The bar chart below shows how Lambart 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 Lambart surname at the time of the 2020 Census, not any inherent property of the name itself.
- White86.7% · 91
- Black or African American10.5% · 11
- Two or more races1.9% · 2
- Hispanic or Latino1.0% · 1
Timeline
Historical Census data for Lambart
Lambart 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
#160,975
National surname rank
Recorded bearers 100
-2 bearers (-2.0%)
Per 100,000 0.03
Rank movement Down 12,731 places
2020
#152,989
National surname rank
Recorded bearers 105
+5 bearers (+5.0%)
Per 100,000 0.04
Rank movement Up 7,986 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #148,244 | 102 | 0.04 | First available Census row | First available Census row |
| 2010 | #160,975 | 100 | 0.03 | -2 bearers (-2.0%) | Down 12,731 places |
| 2020 | #152,989 | 105 | 0.04 | +5 bearers (+5.0%) | Up 7,986 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 Lambart 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 | #152,989 | 5.0% |
| Count | 100 | 105 | 5.0% |
| Per 100K | 0.03 | 0.04 | 17.1% |
Between the 2010 and 2020 Census, the number of Lambart bearers went from 100 to 105 (+5.0% change). The surname moved up 7,986 positions in the national ranking, going from #160,975 to #152,989.
FAQ
Lambart surname: questions and answers
How many people in the U.S. have the surname Lambart?
Name Census estimates that about 120 living Americans carry the surname Lambart. Using the current population baseline, that works out to roughly 1 in 2,856,286 residents.
How common is Lambart?
Lambart ranks #152,989 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 105 people with the surname Lambart. That is different from the site's living-bearer estimate (120), 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 Lambart.
Has Lambart become more or less common over time?
Between 2010 and 2020, the surname Lambart went from 100 recorded bearers to 105. That is an increase of 5 (+5.0%). In the national ranking it rose from #160,975 to #152,989.
What does the Census say about the background of Lambart?
Among Census respondents with the surname Lambart, the largest self-reported group is White at 86.7%. The next largest groups are Black (10.5%) and Two or More Races (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 Lambart in the 2020 Census, accounting for 86.7% (91 people in the source table).
What is the full ancestry breakdown?
Lambart appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (86.7%), Black (10.5%), Two or More Races (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 Lambart (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 Lambart mean?
A surname derived from the Germanic personal name Lambert, meaning "bright land". 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 Lambart (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 Lambart?
You can see how many people are called Lambart on our sister site HowManyOfMe.org — same data roots, lighter UI.