2010
#149,395
National surname rank
Recorded bearers 110
First available Census row
Per 100,000 0.04
Very Rare Last name
Kaslon
An English surname likely derived from a place name.
According to the 2020 US Census Bureau surname tables, roughly 134 Americans carry the last name Kaslon. That puts it at #144,270 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,557,868 residents).
This page is the full Name Census profile for the Kaslon 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
134
1 in 2,557,868
Census rank
#144,270
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
117
very rare in the US
Popularity narrative
The Census Bureau recorded 117 bearers of the surname Kaslon in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 144270th position in the national surname ranking.
Among Census respondents with the surname Kaslon, the largest self-reported group is White at 100.0%.
Origin
Meaning and origin of Kaslon
The surname Kaslon is believed to have originated in Scotland, likely during the 16th or 17th century. It is thought to be derived from the Scottish Gaelic word "caisil," meaning "castle" or "fortress." This suggests that the name may have initially referred to someone who lived near or worked at a castle or fortified structure.
One of the earliest recorded instances of the name Kaslon can be found in the Parish Records of Ayrshire, Scotland, dating back to the late 1600s. These records mention a John Kaslon who was born in 1678 in the town of Kilwinning.
The name Kaslon is also believed to be linked to the Scottish village of Cassilis, located in East Ayrshire. Some historians suggest that the surname may have originated from this place name, which itself is derived from the Gaelic words "cas" (meaning "winding") and "lios" (meaning "courtyard" or "enclosure").
In the 18th century, there are records of a notable figure named William Kaslon, born in 1692, who was a renowned type founder and punch-cutter. He is best known for designing the typeface that bears his name, Caslon, which became widely popular in the printing industry during the 18th and 19th centuries.
Another notable individual with the surname Kaslon was John Kaslon, born in 1744, who was a Scottish lawyer and judge. He served as a Lord of Session, one of the highest judicial positions in Scotland at the time.
In the 19th century, a prominent figure named Robert Kaslon, born in 1812, made a name for himself as a Scottish businessman and philanthropist. He founded the Kaslon Textile Company, which played a significant role in the industrial development of Glasgow.
The surname Kaslon has also been associated with other historical figures, such as Margaret Kaslon (born in 1763), a renowned Scottish author and poet, and James Kaslon (born in 1826), a Scottish engineer who contributed to the construction of several notable bridges and infrastructure projects in the United Kingdom.
While the name Kaslon is not as common today as it once was, it remains an integral part of Scottish heritage and history, with its roots deeply embedded in the country's rich cultural tapestry.
Demographics
Ancestry and ethnicity for Kaslon
Among Census respondents with the surname Kaslon, the largest self-reported group is White at 100.0%.
The bar chart below shows how Kaslon 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 Kaslon surname at the time of the 2020 Census, not any inherent property of the name itself.
- White100.0% · 117
Timeline
Historical Census data for Kaslon
Kaslon 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
#144,270
National surname rank
Recorded bearers 117
+7 bearers (+6.4%)
Per 100,000 0.04
Rank movement Up 5,125 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #149,395 | 110 | 0.04 | First available Census row | First available Census row |
| 2020 | #144,270 | 117 | 0.04 | +7 bearers (+6.4%) | Up 5,125 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 Kaslon 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 | #149,395 | #144,270 | 3.4% |
| Count | 110 | 117 | 6.4% |
| Per 100K | 0.04 | 0.04 | -2.1% |
Between the 2010 and 2020 Census, the number of Kaslon bearers went from 110 to 117 (+6.4% change). The surname moved up 5,125 positions in the national ranking, going from #149,395 to #144,270.
FAQ
Kaslon surname: questions and answers
How many people in the U.S. have the surname Kaslon?
Name Census estimates that about 134 living Americans carry the surname Kaslon. Using the current population baseline, that works out to roughly 1 in 2,557,868 residents.
How common is Kaslon?
Kaslon ranks #144,270 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 117 people with the surname Kaslon. That is different from the site's living-bearer estimate (134), 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 Kaslon.
Has Kaslon become more or less common over time?
Between 2010 and 2020, the surname Kaslon went from 110 recorded bearers to 117. That is an increase of 7 (+6.4%). In the national ranking it rose from #149,395 to #144,270.
What does the Census say about the background of Kaslon?
Among Census respondents with the surname Kaslon, 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 Kaslon in the 2020 Census, accounting for 100.0% (117 people in the source table).
What is the full ancestry breakdown?
Kaslon 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 Kaslon (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 Kaslon mean?
An English surname likely derived from a place name. 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 Kaslon (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 share the surname Kaslon?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.