Is Hennessy a boy or girl name?

Hennessy is listed for both boys and girls in our name lists. It is recorded in United States, Australia, Canada and other countries. US Social Security records count 1,630 babies named Hennessy, which is too few for a year-by-year chart here.

This page shows only what our lists record for Hennessy. We do not publish name meanings or origins. Sources and method.