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| Hennessy | Very numerous: all areas, mainly Munster and S Leinster. Ir. Ó h-Aonghusa, from the personal name Aonghus, earlier Óengus. There were septs in the Midlands and W Cork. The Hennessys of Cognac fame came from Mallow. IF. |
| Hensey | fairly rare: Dublin and scattered. A variant of Hennessy, q.v. |
| Ó h-Aonghusa | rare: scattered. Ir.Lang. See Hennessy. |
| Ó h-Aonghusa | Hennessy: líonmhar: Laighin & Mumhain. Clann a bhí suite in Uíbh Fhailí. Leathaigh go C. Mumhan mar a mbíonn Henchy ortha uaireannta. B'as Mala do lucht an bhranda sa Fhrainc. IF & SGG. |
Parishes where a Hennessey and a second surname married each other.
This list shows total Hennessey Roman Catholic marriages by county.
Click on the county to see detail.