How common is the Hennessy surname?

There are approximately 45,000 people with the surname Hennessy in the United States.

Are there Hennessy soldiers in Civil War records?

Yes, 305 soldiers with the Hennessy surname appear in Civil War records.

Hennessy

Q: What does the surname Hennessy mean?

The surname Hennessy means "Descendant of Aonghus, a Gaelic personal name meaning 'one choice' or 'unique vigor'.". It is of Irish, from Gaelic Ó hAonghusa origin.

Patronymic

Meaning

Descendant of Aonghus, a Gaelic personal name meaning 'one choice' or 'unique vigor'.

Etymology

Hennessy derives from the Irish Gaelic 'Ó hAonghusa', where 'Ó' means 'descendant of' and Aonghus is a personal name. The name was anglicized from the Irish form through phonetic adaptation over centuries.

About the Hennessy Surname

Hennessy is a prominent Irish surname with roots in Gaelic nobility and clan traditions. The name is particularly associated with the Hennessy cognac brand, founded by an Irish merchant family.

Distribution & Frequency

Estimated 45,000 bearers in the United States #549 most common surname

Rare Common

Primarily found in Ireland and among Irish diaspora communities, particularly in the United States, Australia, and Canada.

Hennessy Surname Distribution

Geographic distribution based on Civil War military records.

Fewer

People with the Hennessy Surname

F.B. Hennessy

Captain

Quick Facts

Origin: Irish, from Gaelic Ó hAonghusa
Classification: Patronymic
Earliest Record: Medieval Ireland
Estimated Bearers: 45,000

War Records

305 soldiers with the Hennessy surname found in Civil War records.

Search war records →