2000
#147,095
National surname rank
Recorded bearers 103
First available Census row
Per 100,000 0.04
Very Rare Last name
Kudlac
A surname of Slavic origin, likely derived from an occupational term related to textiles or hair processing.
According to the 2020 US Census Bureau surname tables, roughly 117 Americans carry the last name Kudlac. 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 Kudlac 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 Kudlac 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 Kudlac, the largest self-reported group is White at 95.1%. The next largest groups are Hispanic (2.0%) and Two or More Races (2.0%).
Origin
Meaning and origin of Kudlac
The surname Kudlac originates from the Czech Republic, with its roots traceable to the 15th century. It is believed to be derived from the Old Czech word "kudla," meaning a small knife or dagger, suggesting a possible connection to a profession or trade involving such tools.
One of the earliest recorded instances of the name can be found in the records of the town of Litomyšl, dated 1487, where a certain Jan Kudlac is mentioned. This indicates the presence of the surname in the region during the late medieval period.
In the 16th century, there are records of a prominent Kudlac family residing in the town of Chrudim, situated in the eastern part of the Czech Kingdom. Tomáš Kudlac (1542-1617), a notable figure from this family, served as a respected magistrate and played a significant role in the local administration.
The name Kudlac has also been associated with several place names in the Czech lands, such as Kudlacovice, a village located in the Moravian region. This suggests that the name may have originated from a specific location or settlement.
During the 17th century, the surname gained recognition through the works of Jan Kudlac (1604-1672), a renowned Czech scholar and theologian. His scholarly contributions to religious studies and philosophy earned him widespread acclaim.
Another notable figure bearing the Kudlac surname was Václav Kudlac (1712-1788), a respected architect and builder who left his mark on several prominent structures in Prague and its surrounding areas.
In the 19th century, the name Kudlac gained prominence in the field of literature through the works of Antonín Kudlac (1819-1892), a celebrated Czech poet and author whose writings captured the essence of the Romantic era.
While the surname Kudlac is primarily associated with the Czech Republic, it has also been found in other regions, such as Slovakia and Poland, likely due to migration and cultural exchange between these neighboring countries.
Demographics
Ancestry and ethnicity for Kudlac
Among Census respondents with the surname Kudlac, the largest self-reported group is White at 95.1%. The next largest groups are Hispanic (2.0%) and Two or More Races (2.0%).
The bar chart below shows how Kudlac 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 Kudlac surname at the time of the 2020 Census, not any inherent property of the name itself.
- White95.1% · 97
- Hispanic or Latino2.0% · 2
- Two or more races2.0% · 2
- American Indian and Alaska Native1.0% · 1
Timeline
Historical Census data for Kudlac
Kudlac 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
#147,253
National surname rank
Recorded bearers 112
+9 bearers (+8.7%)
Per 100,000 0.04
Rank movement Down 158 places
2020
#154,755
National surname rank
Recorded bearers 102
-10 bearers (-8.9%)
Per 100,000 0.03
Rank movement Down 7,502 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #147,095 | 103 | 0.04 | First available Census row | First available Census row |
| 2010 | #147,253 | 112 | 0.04 | +9 bearers (+8.7%) | Down 158 places |
| 2020 | #154,755 | 102 | 0.03 | -10 bearers (-8.9%) | Down 7,502 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 Kudlac 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 | #147,253 | #154,755 | -5.1% |
| Count | 112 | 102 | -8.9% |
| Per 100K | 0.04 | 0.03 | -14.7% |
Between the 2010 and 2020 Census, the number of Kudlac bearers went from 112 to 102 (-8.9% change). The surname moved down 7,502 positions in the national ranking, going from #147,253 to #154,755.
FAQ
Kudlac surname: questions and answers
How many people in the U.S. have the surname Kudlac?
Name Census estimates that about 117 living Americans carry the surname Kudlac. Using the current population baseline, that works out to roughly 1 in 2,929,524 residents.
How common is Kudlac?
Kudlac 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 Kudlac. 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 Kudlac.
Has Kudlac become more or less common over time?
Between 2010 and 2020, the surname Kudlac went from 112 recorded bearers to 102. That is a decrease of 10 (-8.9%). In the national ranking it fell from #147,253 to #154,755.
What does the Census say about the background of Kudlac?
Among Census respondents with the surname Kudlac, the largest self-reported group is White at 95.1%. The next largest groups are Hispanic (2.0%) and Two or More Races (2.0%). 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 Kudlac in the 2020 Census, accounting for 95.1% (97 people in the source table).
What is the full ancestry breakdown?
Kudlac appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (95.1%), Hispanic (2.0%), Two or More Races (2.0%). 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 Kudlac (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 Kudlac mean?
A surname of Slavic origin, likely derived from an occupational term related to textiles or hair processing. 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 Kudlac (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 Kudlac?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.