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| Gannon | numerous: Connacht, Midlands etc. Ir. Mag Fhionnáin, fionn - fair. A family of Mayo. The name appears as Ó Geanáin in the spoken language. SI & IF. |
| Mag Fhionnáin | Gannon: líonmhar: Connachta & Lár na Tíre. Bhí clanna díobh in Iorras (Maigh Eo) agus i Ros Comáin-Liatroim. Ó Geanáin i gcaint na ndaoine. SGG. |
Parishes where Gannion and a second surname are both baptised.
This list shows total Gannion Roman Catholic baptisms by county.
Click on the county to see detail.