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| Name. |
County. |
Meaning. |
| oooooooooooooooooooo | ooooooooooooooo | |
| Hacketstown | Co Carlow | |
| Harold's Cross | Co Dublin | |
| Headford | Co Galway | |
| Heagles | Near Ballymoney; Eaglais, a church. | |
| Hillsborough | Co Down | Named for the plantation family Hill |
| Hilltown | Co Down | Named for the plantation family Hill |
| Hollymount | Co Mayo | |
| Holycross | ||
| Horse and Jockey | ||
| Hook Head | Co Wexford | |
| Hospital | Co Limerick | From the Irish Spiddal |
| Howth; | Co Dublin | From the Danish Hoved, a head. Old Irish name Ben Edar, the peak of Edar, a legendary personage. |
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