How Many People Are Named Hennesy?
An estimated 83 people in the United States have the first name Hennesy. It is almost exclusively a female name. The average bearer is 19 years old, and Hennesy peaked in popularity in 2010 with 11 births that year.
Below you will find a full statistical profile of Hennesy as a first name in the United States, including gender data, a year-by-year popularity timeline going back to 1880, a decade breakdown, and state-by-state birth registrations. You can also check how many people share the full name Hennesy paired with any surname.
Key Insights
- Hennesy is exceptionally rare. Fewer than 100 people with this name are estimated to be alive in the U.S. today.
Estimated Living Americans
83
About 1 in 4,129,570 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
100.0% confidence
Average Age
19
years old
Peak Year
2010
11 births
Total Registered
84
since 1880
Gender Distribution for Hennesy
Hennesy is almost exclusively a female name. Out of 84 total births registered, 100.0% were female.
Hennesy as a female name
Ranked #15,308 in 2014
6 female births in 2014
Peak: 2010 (11 births)
Hennesy: Popularity Over Time
SSA records for Hennesy span from the 2000s to the 2010s, covering 2 decades of naming data. The most popular decade for this name was the 2000s, when 59 babies were registered. While Hennesy is less common than at its peak in the 2000s, it remains a well-established name with steady registrations.
Hennesy by Decade
How has Hennesy tracked across different eras? The table below groups all SSA birth registrations into 10-year periods, with separate male and female counts. The colored bar shows each decade's share relative to the peak.
Hennesy by State
Hennesy + Last Name Combinations
How many people share a full name with Hennesy as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Hennesy
Other first names starting with H with a similar number of bearers.
Hennesy: Questions and Answers
How many people in the U.S. are named Hennesy?
We estimate approximately 83 people named Hennesy are alive in the United States today. This is based on SSA birth records from 1880 to 2024, adjusted for mortality using CDC life tables. About 1 in 4,129,570 Americans share this first name.
Is Hennesy a common name?
Hennesy is classified as "Very Rare" and is more popular than 61.8% of all first names in the SSA database. A total of 84 births have been registered with this name since 1880.
When was Hennesy most popular?
Hennesy reached peak popularity in 2010, when 11 babies were given this name. The average age of a living person named Hennesy is approximately 19 years old, reflecting when the name was most commonly given.
Is Hennesy a female name?
Hennesy is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Hennesy Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Hennesy Smith, Hennesy Johnson, Hennesy Williams. You can also search any combination on our homepage.
Where does this data come from?
Our estimates use Social Security Administration birth records (1880 to 2024), adjusted for survival using CDC 2023 life tables broken down by sex. The U.S. population figure (342,754,338) is from the Census Bureau's July 2025 estimate. Full methodology.
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