Hennessy

H4E1N1N1E1S1S1Y4
/ˈhɛnəsi/

proper noun

A surname from Irish.

OriginIrish Ó hAonghusa →
Less commonScrabble 14
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Meanings

proper nounHennessy (plural Hennessys)

plural Hennessys · alternative Hennessey

  1. A surname from Irish.

Origin

  1. IrishÓ hAonghusa“descendant of Angus”
  2. EnglishHennessy

Anglicized from Irish Ó hAonghusa (“descendant of Angus”).

More words from Irish

Full word history & related roots →
Cite this entry
APA

Hennessy. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/Hennessy

MLA

“Hennessy.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Hennessy. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “Hennessy,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/Hennessy.

Source: Hennessy on Wiktionary, CC BY-SA 4.0.