Recorded 1991–2025 · United States
Hennessy was most popular in 2019, when 82 American babies were given the name — ranking #3,968 that year. In 2025 it ranked #6,835, with 37 births. Across 1880–2025 the Social Security Administration has recorded 1,630 people named Hennessy.
Across the whole record Hennessy is a girl’s name — 96.2% of the 1,630 Americans given it were girls and 3.8% were boys. In births since 2016 it is 97% girls and 3% boys.
Counted from every US birth the Social Security Administration recorded under this name, so it reflects use rather than opinion. A name given to fewer than five babies of one sex in a year is withheld at source and is not counted.
How much more common the name is in each state than across the country as a whole.
See Hennessy on the interactive charts
Source: U.S.A. Social Security Administration. Years 1880–2025. namelegacy.org