Meaning and Origin of Hennessy - FamilyEducation

Meaning and Origin of: Hennessy

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Boy name origins & meanings:

  • Irish : Surname

Family name origins & meanings:

  • Irish : reduced form of O’Hennessy, an Anglicized form of Gaelic Ó hAonghusa ‘descendant of Aonghus’ (see Angus, and compare McGinnis).