Hennessy Name Meaning

The name Hennessy has an interesting origin and is primarily known as a surname rather than a given name. It is an anglicized version of the Irish surname Ó hAonghusa, meaning "descendant of Aonghus" or "son of Aonghus." Aonghus is a Gaelic given name derived from the Old Irish words "aon" meaning "one" and "gus" meaning "choice" or "vigor."

As a given name, Hennessy can be given to both boys and girls. Due to its surname origin, it is not as commonly used as a first name. However, it has gained some popularity in recent years.