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Hennessy
GirlMeaning of Hennessy: Irish: 'descendant of Aonghus'
Hennessy is a girl's name most strongly associated with Irish naming. It has 8 letters and 3 syllables, and it is familiar but far from overused — 3773rd most popular girls' name in the United States in 2025.
US rank 2025
#3773
37 babies in 2025
England & Wales 2024
—
Fewer than 3 babies or unlisted
US babies since 1880
1,630
First recorded 1991 · peak 2019
Trend
stable
Style: uncommon
Popularity over time
Gender split
4% boys · 96% girls, based on US, UK and international usage.
Origins & cultures
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