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| Hanahan | Ir. Ó h-Annacháin. Probably a synonym of Hannigan, q.v. The name does not appear in current telephone directories, but has been previously recorded. |
| 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. |
| Ó h-Annacháin | Hanaghan: fíor-annamh: B.Á.C. Sloinne a bhain le Luimneach tráth. SI. |
Parishes where Hanahan and a second surname are both baptised.
This list shows total Hanahan Roman Catholic baptisms by county.
Click on the county to see detail.