Hennessy
Girl name · #3946 in 2025 · Very rare
How old is the name Hennessy? In official American birth records, Hennessy has been tracked continuously since 1991, giving it 34 years of documented American history.
Hennessy ranks #3946 among American girls' names as of 2025, with 37 newborns given the name that year. A decade ago it stood at #3915, so the name has been falling over the past ten years. Roughly one in every 48,649 girls born in 2025 was named Hennessy.
Babies named Hennessy per year. Source: Official national birth records.
The 34-year story
Hennessy first appears in the Social Security records in 1991, when 5 girls received the name. Its peak came in 2019, when 82 girls were named Hennessy — good for #2231 that year. Today's parents encounter it on its way down the popularity curve, which for many parents is exactly the appeal. Following the curve matters more than today's snapshot: a name's position on its rise-peak-decline arc is the best predictor of how common it will feel in a kindergarten class five years from now.
Unlock the 5-year forecast and compare Hennessy against up to 5 other names.
Uniqueness: will there be another Hennessy in class?
On our rarity read — which blends how common Hennessy is today with its five-year momentum — the name reads as "very rare". A high score means genuine rarity — your Hennessy will likely be the only one in the room, with the occasional spelling-out as the price.
Where Hennessy is most common
State-level data for Hennessy is too sparse in 2025 to rank by rate — in most states its count falls below the SSA's per-state reporting threshold (counts under 5 are withheld).
Names like Hennessy
Statistically, parents drawn to Hennessy tend to be choosing among names with similar popularity arcs, era profiles, and sounds — the closest matches in our model are Pessy, Amairany, Zissy, Janelly, and Cerenity.
PessyAmairanyZissyJanellyCerenityHarmoneeRosyBrianny
Rank history (last 25 years)
| Year | Babies named Hennessy | Rank |
|---|---|---|
| 2025 | 37 | #3903 |
| 2024 | 44 | #3516 |
| 2023 | 39 | #3833 |
| 2022 | 66 | #2639 |
| 2021 | 67 | #2586 |
| 2020 | 53 | #3015 |
| 2019 | 82 | #2231 |
| 2018 | 74 | #2419 |
| 2017 | 45 | #3436 |
| 2016 | 44 | #3523 |
| 2015 | 38 | #3915 |
| 2014 | 49 | #3272 |
| 2013 | 62 | #2769 |
| 2012 | 57 | #2978 |
| 2011 | 62 | #2796 |
| 2010 | 71 | #2562 |
| 2009 | 78 | #2446 |
| 2008 | 70 | #2630 |
| 2007 | 57 | #3047 |
| 2006 | 74 | #2485 |
| 2005 | 62 | #2704 |
| 2004 | 54 | #2927 |
| 2003 | 49 | #3043 |
| 2002 | 39 | #3461 |
| 2001 | 41 | #3316 |
Frequently asked questions
How old is the name Hennessy?
In official American birth records, the name Hennessy first appeared in 1991 (over 34 years ago), when 5 newborn girls received the name. It has been tracked in modern national records for 34 years.
Is Hennessy a popular girl name?
Hennessy ranked #3946 among girls in 2025 with 37 babies given the name — outside the top 500, making it an uncommon pick. Ten years earlier it ranked #3915.
When was the name Hennessy most popular?
Hennessy peaked in 2019, when 82 American girls received the name (ranked #2231 that year). Since 2019 the name has declined from that high.
How rare is the name Hennessy?
In 2025, roughly 1 in 48,649 newborn American girls was named Hennessy. On our rarity scale (rarity blended with momentum) we classify it as "very rare".
Data source: Official American birth records, 1880–2025, national and state files. Counts reflect registered birth records for American families.