Henessy
Of Irish origin, possibly derived from an anglicized form of Gaelic surnames.
Name Census estimates that about 160 living Americans carry the first name Henessy. The name is used almost exclusively for girls. The average person named Henessy today is around 19 years old, and the year with the single highest number of Henessy births was 2005 (19 babies).
This page is the full Name Census profile for Henessy. Below you will find a gender breakdown showing how the name splits between male and female registrations, a year-by-year popularity chart stretching back to 1880, decade-level totals, the top US states for this name, its meaning and etymology, and a set of frequently asked questions with data-backed answers.
People living today
160
~ 1 in 2,142,215 Americans
Peak year
2005
19 babies that year
Average age
19
years old
2019 SSA rank
#16,433
Tracked since 1997
Census
Henessy in the 2020 Census
The 2020 Census recorded 187 people with the first name Henessy, which placed it at #40,012 in the published first-name tables. This is a snapshot of people who already had the name at the time of the Census.
The SSA sections elsewhere on this page answer a different question: how often parents gave the name to babies over time. The "people living today" figure on this page is different again: it is a current estimate built from SSA birth records and age-based survival rates, so the two numbers are not expected to match exactly.
2020 Census rank
#40,012
National first-name rank
People counted
187
187 in the published race/origin table
Per 100,000
0.1
People with this name in 2020
Largest reported group
Hispanic or Latino
86.6% of people with this name
Demographics
Ancestry and ethnicity for Henessy
In the 2020 Census race and Hispanic-origin table, the largest reported group for people named Henessy is Hispanic at 86.6%. The next largest groups are White (7.0%) and Asian/Pacific Islander (4.3%). These figures describe the people who had the name in 2020, not any inherent property of the name itself.
The bar chart below shows how people with the first name Henessy 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 name, the Bureau suppresses the figure to protect individual privacy, which is why some names show fewer than six slices.
Percentages are shown so the breakdown is easy to read across every published category. Because the 2020 Census first-name file also includes raw headcounts for each group, Name Census can show those alongside the percentages in the legend and hover tooltip.
Keep in mind that these are self-reported numbers. A first name does not determine a person's race or ethnicity, and the distribution you see here reflects the specific population who happened to carry the name Henessy at the time of the 2020 Census, not any inherent property of the name itself.
- Hispanic or Latino86.6% · 162
- White7.0% · 13
- Asian and Pacific Islander4.3% · 8
- Black or African American1.1% · 2
- American Indian and Alaska Native1.1% · 2
Popularity
Henessy: popularity over time
The SSA tracks Henessy from the 1990s through to the 2010s, spanning 3 decades of birth certificate data. The biggest single decade for the name was the 2000s, with 88 total registrations. Although the numbers have come down from the 2000s peak, Henessy remains solidly in use and shows no sign of disappearing from maternity wards.
Babies born per year
Decades
Henessy by decade
The table below breaks the full SSA timeline into ten-year windows. Each row shows how many male and female babies were given the name Henessy during that decade, along with a combined total. This is useful for spotting eras where the name surged or retreated.
Geography
Where Henessys live
Origin
Meaning and history of Henessy
The name Henessy is believed to have originated from the Irish Gaelic language, with its roots traced back to the medieval period. It is thought to be a variant of the traditional Irish name Enaisi, which means "bearer of wisdom" or "sage." The name's spelling has evolved over time, with alternative forms such as Hennessy and Hennesy appearing in historical records.
One of the earliest known references to the name can be found in the Annals of the Four Masters, a chronicle of medieval Irish history. In this text, the name Enaisi is mentioned in connection with a renowned scholar and poet who lived in the 7th century AD. This suggests that the name was in use among the learned classes of Irish society during that time.
Throughout the Middle Ages, the name Henessy was particularly prevalent in the province of Munster, where it was associated with several notable families and individuals. One such figure was Dermot Henessy, a prominent chieftain and military leader who played a key role in the Irish rebellion against English rule in the 16th century.
As the Irish diaspora spread across the globe, the name Henessy also gained recognition in other parts of the world. In the 18th century, a French family of Irish descent established the renowned Hennessy Cognac distillery, which contributed to the name's widespread recognition. Richard Hennessy, the founder of the company, was born in 1724 and played a pivotal role in the development of the Cognac industry.
Another noteworthy individual bearing the name Henessy was John Henessy, an Irish-American politician and lawyer who served as a member of the United States House of Representatives from Pennsylvania in the late 19th century. He was born in 1834 and played a significant role in shaping the political landscape of his time.
In the realm of literature, the name Henessy is associated with the Irish writer and poet Austin Henessy, who lived from 1854 to 1929. His works, which often explored themes of Irish identity and culture, contributed to the preservation and promotion of Irish literary heritage.
These are just a few examples of individuals who have carried the name Henessy throughout history, reflecting its rich cultural roots and enduring legacy across various fields and regions.
People
Henessy + last name combinations
How many people share a full name with Henessy as the first name? Click a combination below to see the estimate, or search any pairing.
Related
Other names starting with H
Other first names starting with H with a similar number of bearers.
FAQ
Henessy: questions and answers
How many people in the U.S. are named Henessy?
Name Census puts the figure at roughly 160 living Americans. We arrive at this by taking every SSA birth registration for Henessy going back to 1880 and adjusting each cohort for expected survival using CDC actuarial life tables. The result is an age-weighted living-bearer count, not a raw birth total. That works out to about 1 in 2,142,215 US residents.
Is Henessy a common name?
We classify Henessy as "Very Rare". It ranks above 71.2% of all first names in the SSA dataset by living bearers. Across the full history of the data, 162 babies have been registered with this name.
When was Henessy most popular?
The single biggest year for Henessy was 2005, when 19 babies received the name. The fact that the average living Henessy is about 19 years old gives you a rough sense of which era contributed the most bearers who are still alive today.
How common was Henessy in the 2020 Census?
The published 2020 Census first-name tables recorded 187 people with the name Henessy, or 0.06 per 100,000 residents. That placed it at #40,012 in the national Census ranking for first names.
Why is the Census count different from the living estimate?
Because they measure different things. The Census figure is a count of people who had the name Henessy in 2020. The living estimate aims to answer a current question instead: how many people with the name are alive today, based on SSA birth records and age-based survival rates. Since one number is a 2020 snapshot and the other is a present-day estimate, they are not expected to be identical.
What does the Census say about the gender split for Henessy?
In the 2020 Census sex table, Henessy leans strongly female. 177 people counted with this name were female (92.2%), compared with 15 male bearers (7.8%). The Census view is a snapshot of people living with the name in 2020, while the SSA section above tracks births across time.
What does the Census say about the background of people named Henessy?
In the 2020 Census race and Hispanic-origin table, the largest reported group for people named Henessy is Hispanic at 86.6%. The next largest groups are White (7.0%) and Asian/Pacific Islander (4.3%). These figures describe the people who had the name in 2020, not any inherent property of the name itself. The percentages in the chart above come from self-reported race and Hispanic-origin responses in the 2020 Census.
Which group reports the name Henessy most often in the Census?
Hispanic is the largest reported group for people named Henessy in the 2020 Census, accounting for 86.6% (162 people in the published table).
Why can the Census sex total and race total differ slightly?
The Census Bureau published separate 2020 tables for sex and for race/Hispanic origin, and the released figures can differ slightly because of privacy protection in the public files. That is why this page treats the gender section and the race/origin section as two related snapshots instead of forcing them into one identical total.
Does every first name have Census demographic data?
No. The public Census first-name release only includes names that met the Bureau's publication rules, so many rarer names in the SSA files have no Census demographic snapshot. When that happens, the SSA trend, gender history, and state sections still appear, but the 2020 Census demographic sections are omitted.
What does the SSA popularity chart show?
The chart tracks births, not the number of people alive with the name today. Each point shows how many babies were given the name Henessy in that year. That makes it useful for spotting when the name rose, peaked, or faded.
Is Henessy a female name?
Yes, 100.0% of people registered as Henessy in the SSA data are female. You can see the full per-sex comparison in the gender distribution section above, which includes the latest year rank, birth count, and peak year for each sex.
Is Henessy still being used today?
Yes. The SSA still recorded Henessy in 2024, and the page above shows its latest-year rank where available. A name can be well past its peak and still remain in steady use, especially if it built up a large population over earlier decades.
Why can a name have a lot of living bearers even if it is not trendy now?
Because living-bearer counts and current baby-name popularity measure different things. A name like Henessy can build up a very large population over many decades, even if fewer parents are choosing it now than they did at its peak.
Where does this data come from?
First-name figures come from the Social Security Administration's national baby name files, which cover every name on a birth certificate from 1880 to 2024. Living-bearer estimates layer in CDC actuarial life tables broken out by sex to account for mortality. The population baseline (342,754,338) is the Census Bureau's latest national estimate. You can read the full calculation on our methodology page.
How common is the name Henessy?
For a quick modern take, check how many people have the name Henessy on our sister site HowManyOfMe.org.