The O'Hennessy Family Name

Many O'Hennessy families will find their roots under Hennessy, the form most records use.

What does the surname O'Hennessy mean?

The name is generally explained as “Descendant of Aonghus”.

Is O'Hennessy the same name as Hennessy?

The O' in front of the name is a particle that was often added to Hennessy in records. The same family of names includes Hennessey and Henesy.

Is there a O'Hennessy coat of arms?

There is no single O'Hennessy family crest for every bearer. Herald Lab researches the arms historically associated with the name and explains whose they were.

Research your O'Hennessy family history with a full surname report and painted coat of arms.