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| Halloran | Quite numerous: Connacht and scattered. Ir. Ó h-Allmhúráin, allmhúrach, a stranger from overseas, a pirate! Originally two septs: Galway and Clare. For more correct distribution see the more numerous O'Halloran. IF & SGG. |
| Holleran | fairly rare: Galway-Mayo. A Connacht variant of Halloran & O'Halloran, q.v. |
| Ó h-Allmhúráin | O'Halloran: líonmhar gach áird, sa Mhumhain ach go h-áirithe. Brí: duine ón gcoigrích nó foghlaí mara! Clanna a bhí in (a) Gaillimh, (b) Tuathmhumhain. IF,MIF. |
| O'Halloran | Very numerous: all areas, especially Munster. Ir. Ó h-Allmhúráin, allmhúrach, foreign. There were septs in Clare and Galway. See also Halloran. IF. |
Parishes where Hallaran and a second surname are both baptised.
This list shows total Hallaran Roman Catholic baptisms by county.
Click on the county to see detail.