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| Devalley | rare: Galway. Variant of Devilly, q.v. |
| Devilly | rare: scattered. Ir. Ó Duibhghiolla (dark attendant). There were two septs in Connacht: (1) Southern Uí Fiachrach,(2) Síol Anmchadha, both in Galway. Synonyms are Diffley Devally, Deely and Duffley. MIF. |
| Diffley | fairly rare: Connacht. Variant of Devilly, q.v. |
| Duffley | rare: Roscommon. Variant of Devilly, q.v. |
| Ó Duibhghiolla | Diffley, Devilly, Devalley: cuíosach annamh: Connachta, Gaillimh go sonrach. Dhá chlann: Uí Fiachrach theas; Síol Anmchadha. Brí: dubh + giolla. MIF. |
Parishes where Duffly and a second surname are both baptised.
This list shows total Duffly Roman Catholic baptisms by county.
Click on the county to see detail.