Updated March 26, 2024

Table of contents

Boy name origins & meanings

  • Irish : Surname

How Popular Is The Name Hennessy

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).

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