2010
#145,220
National surname rank
Recorded bearers 114
First available Census row
Per 100,000 0.04
Very Rare Last name
Dadmun
An English patronymic surname derived from the given name Adam combined with "-mun" meaning "protection".
According to the 2020 US Census Bureau surname tables, roughly 116 Americans carry the last name Dadmun. That puts it at #155,270 in the national surname ranking, appearing at a frequency of 0.03 per 100,000 people (about 1 in 2,954,779 residents).
This page is the full Name Census profile for the Dadmun 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
116
1 in 2,954,779
Census rank
#155,270
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
101
very rare in the US
Popularity narrative
The Census Bureau recorded 101 bearers of the surname Dadmun in its 2020 decennial surname file. At a rate of 0.03 per 100,000 residents, it holds the 155270th position in the national surname ranking.
Among Census respondents with the surname Dadmun, the largest self-reported group is White at 99.0%. The next largest groups are Asian/Pacific Islander (1.0%).
Origin
Meaning and origin of Dadmun
The surname DADMUN is of English origin, first appearing in historical records in the late 16th century. It is believed to be a variation of the name Deadman, derived from the Old English words "dead" and "mann," meaning a person who worked with the dead, likely a gravedigger or undertaker.
One of the earliest recorded instances of the name DADMUN can be found in the parish records of St. Mary's Church in Bury St. Edmunds, Suffolk, England, where a John Dadmun was baptized in 1592. The name also appears in the Hearth Tax records of the same county in the late 17th century.
In the early 18th century, the name DADMUN surfaced in the records of the American colonies, suggesting that members of the family had emigrated from England. A notable early bearer of the name in the colonies was Jonathan Dadmun, born in 1712 in Watertown, Massachusetts, who served as a soldier in the French and Indian War.
Another early American with the surname DADMUN was Ebenezer Dadmun, born in 1733 in Brookfield, Massachusetts. He was a farmer and served in the Continental Army during the American Revolutionary War.
In the 19th century, the DADMUN name appeared in various parts of the United States, with concentrations in New England and the Midwest. One notable bearer of the name was John Dadmun, born in 1810 in New York, who was a successful businessman and philanthropist in the city of Rochester.
Another significant figure with the DADMUN surname was William Dadmun, born in 1822 in Ohio. He was a prominent lawyer and served as a judge in the state's court system for several decades.
While the DADMUN name has remained relatively uncommon throughout history, it has left its mark in various regions, particularly in parts of England and the United States, where it has been borne by individuals from various walks of life, including soldiers, farmers, businessmen, and legal professionals.
Demographics
Ancestry and ethnicity for Dadmun
Among Census respondents with the surname Dadmun, the largest self-reported group is White at 99.0%. The next largest groups are Asian/Pacific Islander (1.0%).
The bar chart below shows how Dadmun 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 Dadmun surname at the time of the 2020 Census, not any inherent property of the name itself.
- White99.0% · 100
- Asian and Pacific Islander1.0% · 1
Timeline
Historical Census data for Dadmun
Dadmun 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
#155,270
National surname rank
Recorded bearers 101
-13 bearers (-11.4%)
Per 100,000 0.03
Rank movement Down 10,050 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #145,220 | 114 | 0.04 | First available Census row | First available Census row |
| 2020 | #155,270 | 101 | 0.03 | -13 bearers (-11.4%) | Down 10,050 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 Dadmun 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 | #145,220 | #155,270 | -6.9% |
| Count | 114 | 101 | -11.4% |
| Per 100K | 0.04 | 0.03 | -15.5% |
Between the 2010 and 2020 Census, the number of Dadmun bearers went from 114 to 101 (-11.4% change). The surname moved down 10,050 positions in the national ranking, going from #145,220 to #155,270.
FAQ
Dadmun surname: questions and answers
How many people in the U.S. have the surname Dadmun?
Name Census estimates that about 116 living Americans carry the surname Dadmun. Using the current population baseline, that works out to roughly 1 in 2,954,779 residents.
How common is Dadmun?
Dadmun ranks #155,270 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.03 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 101 people with the surname Dadmun. That is different from the site's living-bearer estimate (116), 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 Dadmun.
Has Dadmun become more or less common over time?
Between 2010 and 2020, the surname Dadmun went from 114 recorded bearers to 101. That is a decrease of 13 (-11.4%). In the national ranking it fell from #145,220 to #155,270.
What does the Census say about the background of Dadmun?
Among Census respondents with the surname Dadmun, the largest self-reported group is White at 99.0%. The next largest groups are Asian/Pacific Islander (1.0%). 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 Dadmun in the 2020 Census, accounting for 99.0% (100 people in the source table).
What is the full ancestry breakdown?
Dadmun appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (99.0%), Asian/Pacific Islander (1.0%). 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 Dadmun (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 Dadmun mean?
An English patronymic surname derived from the given name Adam combined with "-mun" meaning "protection". 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 Dadmun (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 people are called Dadmun?
See how many people are called Dadmun on HowManyOfMe.org, our sister site built around that single question.