How Many People Are Named Hennessy?
people named Hennessy are alive in the United States today (estimate)
About 1 in 211,500 people in the US has this name
Based on 1,630 babies named Hennessy in Social Security records from 1991 to 2025, and the share of each birth year still alive in 2025.
Popularity Rank
💎💎 Very Rare
Peak Year
82 births
Trend
Stable (last 10 years)
⚧ Gender Distribution
Of the babies given the name Hennessy, 96.2% were girls and 3.8% were boys. The share of girls among babies named Hennessy rose from 82.2% in the 1990s to 98.1% in the 2020s.
👥 Age Distribution
The average person named Hennessy alive today is about 14 years old, and 98% are under 30. Half of them were between 7 and 20 in 2025.
📈 Popularity Over Time
Hennessy first appears in the records in 1991 and was given most often in 2019, to 82 babies. In 2025, 37 babies got the name.
Babies given the name each year, 1991 to 2025
🏆 Rank History
Hennessy has never been one of the 100 most popular girls' names. Its best rank was #2,239, in 2019. In 2025 it ranked #3,935.
| Girls | |
|---|---|
| Rank in 2025 | #3,935 |
| Best rank | #2,239 (2019) |
| Years in the top 100 | None |
| Rank in its biggest decade | #2,900 in the 2010s |
📍 State-Wise Distribution
People named Hennessy alive today, by the state where they were born (estimate; state records start in 1910).
More people named Hennessy were born in California than in any other state: about 492 of those alive today. Compared with the national rate in the same years, Hennessy was given 4.2 times as often in California, 2.3 times in Texas and 1.5 times in New York.
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