2010
#148,347
National surname rank
Recorded bearers 111
First available Census row
Per 100,000 0.04
Very Rare Last name
Lenamon
A locational surname derived from a place called Lenamore in County Kildare, Ireland.
According to the 2020 US Census Bureau surname tables, roughly 127 Americans carry the last name Lenamon. That puts it at #148,665 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,698,853 residents).
This page is the full Name Census profile for the Lenamon 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
127
1 in 2,698,853
Census rank
#148,665
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
111
very rare in the US
Popularity narrative
The Census Bureau recorded 111 bearers of the surname Lenamon in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 148665th position in the national surname ranking.
Among Census respondents with the surname Lenamon, the largest self-reported group is White at 92.8%. The next largest groups are Two or More Races (5.4%) and American Indian/Alaska Native (1.8%).
Origin
Meaning and origin of Lenamon
The surname Lenamon has its origins in the Gaelic Irish language and is believed to have first appeared in County Galway, Ireland in the 13th century. It is thought to be derived from the Irish words "leathan" meaning "broad" and "muine" meaning "thicket" or "shrubbery", suggesting the name may have referred to someone living in or near a broad thicket or brush.
One of the earliest recorded mentions of the Lenamon surname can be found in the Annals of the Four Masters, a chronicle of medieval Irish history compiled in the 17th century. The text references a Lenamon family from County Galway who were involved in local conflicts and land disputes during the 14th century.
By the 16th century, variants of the spelling such as "Lenihan" and "Lenehan" had emerged, likely due to differences in pronunciation and transcription. Records from this period also show the Lenamon name appearing in other parts of Ireland, including County Limerick and County Tipperary.
Notable individuals with the Lenamon surname include Dermot Lenamon, a 17th century Irish soldier who fought in the Confederate Wars of the 1640s. Another was Bridget Lenamon, born in 1745 in County Galway, who is believed to have been one of the last native speakers of the Connacht Irish dialect.
In the 19th century, John Lenamon, born in 1832 in County Tipperary, was a prominent Irish nationalist and member of the Fenian Brotherhood, a republican revolutionary organization. Meanwhile, Michael Lenamon, born in 1856 in County Limerick, was a successful businessman and landowner whose estate played a role in the Irish Land Wars of the late 1800s.
Another notable figure was Patrick Lenamon, born in 1879 in County Galway, who emigrated to the United States and became a labor organizer and activist, advocating for better working conditions and workers' rights in the early 20th century.
Demographics
Ancestry and ethnicity for Lenamon
Among Census respondents with the surname Lenamon, the largest self-reported group is White at 92.8%. The next largest groups are Two or More Races (5.4%) and American Indian/Alaska Native (1.8%).
The bar chart below shows how Lenamon 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 Lenamon surname at the time of the 2020 Census, not any inherent property of the name itself.
- White92.8% · 103
- Two or more races5.4% · 6
- American Indian and Alaska Native1.8% · 2
Timeline
Historical Census data for Lenamon
Lenamon 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
#148,665
National surname rank
Recorded bearers 111
+0 bearers (+0.0%)
Per 100,000 0.04
Rank movement Down 318 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #148,347 | 111 | 0.04 | First available Census row | First available Census row |
| 2020 | #148,665 | 111 | 0.04 | +0 bearers (+0.0%) | Down 318 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 Lenamon 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 | #148,347 | #148,665 | -0.2% |
| Count | 111 | 111 | 0.0% |
| Per 100K | 0.04 | 0.04 | -7.2% |
Between the 2010 and 2020 Census, the number of Lenamon bearers went from 111 to 111 (+0.0% change). The surname moved down 318 positions in the national ranking, going from #148,347 to #148,665.
FAQ
Lenamon surname: questions and answers
How many people in the U.S. have the surname Lenamon?
Name Census estimates that about 127 living Americans carry the surname Lenamon. Using the current population baseline, that works out to roughly 1 in 2,698,853 residents.
How common is Lenamon?
Lenamon ranks #148,665 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 111 people with the surname Lenamon. That is different from the site's living-bearer estimate (127), 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 Lenamon.
Has Lenamon become more or less common over time?
Between 2010 and 2020, the surname Lenamon went from 111 recorded bearers to 111. That is an increase of 0 (+0.0%). In the national ranking it fell from #148,347 to #148,665.
What does the Census say about the background of Lenamon?
Among Census respondents with the surname Lenamon, the largest self-reported group is White at 92.8%. The next largest groups are Two or More Races (5.4%) and American Indian/Alaska Native (1.8%). 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 Lenamon in the 2020 Census, accounting for 92.8% (103 people in the source table).
What is the full ancestry breakdown?
Lenamon appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (92.8%), Two or More Races (5.4%), American Indian/Alaska Native (1.8%). 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 Lenamon (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 Lenamon mean?
A locational surname derived from a place called Lenamore in County Kildare, Ireland. 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 Lenamon (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 Lenamon?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.