2000
#135,837
National surname rank
Recorded bearers 114
First available Census row
Per 100,000 0.04
Very Rare Last name
Colclazier
A variant of the surname Calquazer which means a maker or seller of coal or charcoal.
According to the 2010 US Census Bureau surname tables, roughly 137 Americans carry the last name Colclazier. That puts it at #145,220 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,501,856 residents).
This page is the full Name Census profile for the Colclazier 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.
Colclazier appeared in the 2010 Census surname file but was not included in the published 2020 file. The Census Bureau only publishes surnames with at least 100 recorded bearers, so this usually means the name fell below that threshold.
Bearers in the US
137
1 in 2,501,856
Census rank
#145,220
2010 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
114
very rare in the US
Popularity narrative
The Census Bureau recorded 114 bearers of the surname Colclazier in its 2010 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 145220th position in the national surname ranking.
Among Census respondents with the surname Colclazier, the largest self-reported group is White at 87.7%. The next largest groups are Hispanic (4.4%) and American Indian/Alaska Native (4.4%).
Origin
Meaning and origin of Colclazier
The surname COLCLAZIER is believed to have originated in England during the medieval period, likely deriving from an Old English word or place name. One theory suggests it may have evolved from a combination of the Old English words "col" (meaning charcoal) and "clæc" (meaning hill or ridge), potentially referring to a location or occupation associated with charcoal production on a hillside.
Another possibility is that the name stems from a place name containing similar elements, such as a village or hamlet that no longer exists or has been renamed over the centuries. Unfortunately, due to the scarcity of early written records, the precise origin remains uncertain.
One of the earliest known references to the COLCLAZIER surname can be found in the Sussex Subsidy Rolls of 1296, where a Richard Colclazier is listed as a taxpayer. This document provides valuable evidence of the name's existence during the late 13th century in the county of Sussex, England.
In the 14th century, the name appears in the Huntingdonshire Feet of Fines records from 1346, mentioning a John Colclazier involved in a land transaction. This indicates the surname's presence in the region of Huntingdonshire during this time period.
Notable individuals bearing the COLCLAZIER surname throughout history include:
1. William Colclazier (c. 1520 - 1587), a prominent merchant and alderman in the city of London during the reign of Queen Elizabeth I.
2. Margery Colclazier (c. 1625 - 1692), one of the accused during the infamous Salem Witch Trials in colonial Massachusetts. She was ultimately acquitted of the charges.
3. Thomas Colclazier (1761 - 1833), a British soldier who served in the American Revolutionary War and later became a successful landowner in Upper Canada (now Ontario, Canada).
4. Elizabeth Colclazier (1802 - 1876), a pioneering educator and founder of one of the first schools for girls in the state of Ohio, United States.
5. James Colclazier (1842 - 1918), a renowned architect and designer of several iconic buildings in San Francisco, California, including the Palace Hotel and the Cathedral of St. Mary of the Assumption.
It is worth noting that variations in spelling were common throughout history, and the name may have been recorded as Colclazier, Colclayzer, Colclaysier, or other similar forms in different regions and time periods.
Demographics
Ancestry and ethnicity for Colclazier
Among Census respondents with the surname Colclazier, the largest self-reported group is White at 87.7%. The next largest groups are Hispanic (4.4%) and American Indian/Alaska Native (4.4%).
The bar chart below shows how Colclazier bearers described their own race and ethnicity on the 2010 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 Colclazier surname at the time of the 2010 Census, not any inherent property of the name itself.
- White87.7%
- Hispanic or Latino4.4%
- American Indian and Alaska Native4.4%
- Unknown or suppressed3.5%
Timeline
Historical Census data for Colclazier
Colclazier appears in 2 published Census surname files: 2000, 2010. The cards below show how the name's rank and bearer count changed across each release.
2010
#145,220
National surname rank
Recorded bearers 114
+0 bearers (+0.0%)
Per 100,000 0.04
Rank movement Down 9,383 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #135,837 | 114 | 0.04 | First available Census row | First available Census row |
| 2010 | #145,220 | 114 | 0.04 | +0 bearers (+0.0%) | Down 9,383 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
2000 vs 2010 Census
How has the Colclazier surname changed between Census years? The chart shows bearer count side by side, and the table compares rank, count, and frequency.
Census year comparison
20002010
| Metric | 2000 | 2010 | Change |
|---|---|---|---|
| Rank | #135,837 | #145,220 | -6.9% |
| Count | 114 | 114 | 0.0% |
| Per 100K | 0.04 | 0.04 | 0.0% |
Between the 2000 and 2010 Census, the number of Colclazier bearers went from 114 to 114 (+0.0% change). The surname moved down 9,383 positions in the national ranking, going from #135,837 to #145,220.
FAQ
Colclazier surname: questions and answers
How many people in the U.S. have the surname Colclazier?
Name Census estimates that about 137 living Americans carry the surname Colclazier. Using the current population baseline, that works out to roughly 1 in 2,501,856 residents.
How common is Colclazier?
Colclazier ranks #145,220 in the 2010 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 2010 Census file counted 114 people with the surname Colclazier. That is different from the site's living-bearer estimate (137), 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 Colclazier.
Has Colclazier become more or less common over time?
Between 2000 and 2010, the surname Colclazier went from 114 recorded bearers to 114. That is an increase of 0 (+0.0%). In the national ranking it fell from #135,837 to #145,220.
What does the Census say about the background of Colclazier?
Among Census respondents with the surname Colclazier, the largest self-reported group is White at 87.7%. The next largest groups are Hispanic (4.4%) and American Indian/Alaska Native (4.4%). These figures come from the 2010 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 Colclazier in the 2010 Census, accounting for 87.7%.
What is the full ancestry breakdown?
Colclazier appears across multiple self-reported groups in the Census data. The largest shares in the 2010 file are White (87.7%), Hispanic (4.4%), American Indian/Alaska Native (4.4%).
Is this page using the latest Census data?
Not necessarily. Colclazier appears here with 2010 Census data, while the latest surname file loaded on Name Census is 2020. When a surname drops below the Census publication threshold, older rows can still be kept for historical reference even if the name no longer appears in the newest file.
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 Colclazier mean?
A variant of the surname Calquazer which means a maker or seller of coal or charcoal. 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 2010 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 Colclazier (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 Americans have the surname Colclazier?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.