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| Hanan | fairly rare: Cork and scattered. Ir. Ó h-Annáin. Usually as Hannon, q.v. |
| Hannan | fairly numerous: Limerick and generally. Ir. Ó h-Annáin, annadh, delay, possibly. This name is more usual as Hannon. |
| Hannon | numerous: all provinces, especially Connacht and N Munster. Ir. Ó h-Annáin, annadh meaning "delay", perhaps. Originally of Limerick and a substitute for Haneen in Connacht. |
Parishes where Hanning and a second surname are both baptised.
This list shows total Hanning Roman Catholic baptisms by county.
Click on the county to see detail.