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| Name. |
County. |
Meaning. |
| oooooooooooooooooooo | ooooooooooooooo | |
| Racavan | Rath-cabhain, the fort of the hollow. | |
| Rahan | Co Offaly | In King's County; Raithin, a ferny place. |
| Rahaniska | Rahanisky; the rath of the water. | |
| Rahard | Rath-ard, high fort. | |
| Raharney | Co Westmeath; | Rath-Athairne, Aharny's fort. |
| Raheen | Little rath or fort. | |
| Raheenduff | Black little fort Raheenroe; Raithin-ruadh, red little fort. | |
| Rahelty | Rath-eilte, the fort of the doe (eilit). | |
| Raheny | Co Dublin | Rath-~Enna, F. M., Enna's fort. |
| Rahugh | Co Westmeath | The fort of St. Aedh or Hugh, the son of Brec, who built a church in the old rath in the sixth century. |
| Raigh | Same as Rath, a fort. | |
| Rakeeragh | The fort of the sheep (caera). | |
| Ramoan | Co Antrim | Rath-Modhain, Modan's fort. |
| Ranaghan |
Co Derry |
Rannagh; a ferny place (raithne, a fern). Bracken raithean: Coleraine Co. Antrim, Tullyrain Co. Down “corner, knoll of bracken”, Ranaghan Co. Derry. Raithneachán “bracken place” |
| Raphoe | Co Donegal | Rath-bhoth [Ra-voh], F. M., the fort of the boths, tents, or huts. |
| Rasharkin | Co Antrim | Ros-Earcain, Erkan's promontory. |
| Rashee | Co Antrim; | Rath-sithe [Ra-shee], F. M., the fort of the fairies. |
| Ratass | Co Kerry | Rath-teas, southern fort. |
| Rath | A circular fort. | |
| Rathangan | Co Kildare | Rath-Iomghain [Rath-Imgan], Imgan's fort. |
| Rathanny | Rath-eanaighe, the fort of the marsh. | |
| Rathaspick | The fort of the bishop (easpug} | |
| Rathbane | Rathbaun; white rath. | |
| Rathbeg | Little fort | |
| Rathborney | Co Clare | Rath-boirne, the fort of Burren, from its situation in the old district of Burren. |
| Rathcormack | Cormac's fort. | |
| Rathdowney | In Queen's County; Rath-tamhnaigh [Rath-towney], F. M., the fort of the green field (tamhnach). | |
| Rathdrum | The fort of the long hill. | |
| Rathduff | Black fort. | |
| Rathfeigh | Co Meath | The fort of the exercise green. See Faha. |
| Rathfryland | Co Downsee page 4. | |
| Rathglass | Green fort. | |
| Rathkeale | Rath-Gaela, Gaela's fort. | |
| Rathkenny | Rath-Cheannaigh [Kanny], Ceannach's fort. | |
| Rathkieran | Co Kilkenny | Kieran's fort; from St. Kieran of Ossory. See Seirkieran. |
| Rathmore | Great fort. | |
| Rathmoyle | Bald or dilapidated fort. | |
| Rathmullan | Rath-Maelain, F. M., Maelan's rath. | |
| Rathnew | Co Wicklow; Rath-Naoi, F. M., Naoi's fort. | |
| Rathreagh | Rath-riabhach, grey fort. | |
| Rathroe | Red fort. | |
| Rathronan | Ronan's fort. | |
| Rathsallagh | Rath-salach, dirty fort. | |
| Rathvilly | Co Carlow | Rath-bile, F. M., the fort of the old tree. |
| Rattoo | Rath-tuaidh [too], northern fort. | |
| Raw | Rath, a fort. | |
| Rea | Reidh, a coarse mountain flat. | |
| Reask | Reisk; Riasg [Reesk], a marsh. Reen; Rinn, a point of land. | |
| Relagh | Reidhleach [Relagh], same meaning as Rea. | |
| Relickmurry | Reilig, a church: the church of the Blessed Virgin Mary. | |
| Riesk | A marsh; same as Reask. | |
| Rin | Rine, Rinn; Rinn, a point of land. | |
| Ring | Another form of Rin | |
| Ringabella | Near the mouth of Cork harbour; the point of the old tree (bile). | |
| Ringagonagh | Bear Dungarvan; Rinn-0'gCuana [Ogoona], the point or peninsula of the O'Cooneys. | |
| Ringbane | Ringbaun ; white point | |
| Ringcurran | Near Kinsale; the point of the corran or reaping hook; from its shape. | |
| Ringrone | Near Kinsale; written in the Annals of Innisfallen, Rinn-roin, the point of the seal. | |
| Ringvilla | Ringville; Rinn-bhile [villa], the point of the bile or ancient tree. | |
| Rinneen | Lttle point of land. | |
| Rinville | Co Galway | Rinn-Mhil [vil], the point of Mil, a Firbolg chieftain. |
| Risk | Same as Reask. | |
| Roeillaun | Ruadh-oilean [Roo-illaun], red island. | |
| Rooaun | Rooghan, Rooghaun; reddish land (from ruadh, red). | |
| Roosk | Rusg, a marsh. See Reask. | |
| Roosca | Rooskagh, Roosky; Rusgach, marshy, a marshy place. | |
| Roscommon | Ros-Comain, F. M., Coman's wood, from St. Coman, who founded a monastery there in the eighth century. | |
| Roscrea | Written in the Book of Leinster, Ros-cre, Cre's wood. | |
| Roshin | Little ros or promontory. | |
| Roskeen | Ros-caein, beautiful wood. | |
| Ross | In the south generally means a wood; in the north, a peninsula. | |
| Rossbegh | Or Rossbehy west of Killarney ; the peninsula of birches (beith). | |
| Rossbeg | Small wood or promontory. | |
| Ross Carbery | Co Cork | The latter part from the barony of Carbery in which it is situated: it was anciently called Ros-ailithir [allihir], F. M., the wood of the pilgrims. |
| Ross Castle | At Killarney; from the little ros or peninsula on which it stands. | |
| Rosses | Co Donegal | i. e. peninsulas. |
| Rossinver | Co Leitrim | Ros-inbhir, the peninsula of the river mouth; from a point of land running into the south part of Lough Melvin. |
| Rossmore | Great wood or peninsula. | |
| Rossorry | Near Enniskillen; corrupted from Ros-airthir [arher], F. M., the eastern peninsula. | |
| Roughan | Ruan; same as Rooaun. | |
| Rousky | Same as Roosca and Rooskey. | |
| Route | The northern part of Antrim was anciently called Dalriada (F. M.), i. e. Riada's portion or tribe, from Carbery Riada, son of Conary II. (see Corkaguiny); and the latter part (Riada) of this old name, is still preserved in the corrupted form of Route. | |
| Rush | Co Dublin | Ros-eo [Rush-o], F. M., the peninsula of the yew trees. |
| Rusheen | Small wood; a growth of underwood. | |
| Russagh | Ros-each, F. M., the wood of the horses. | |
| Rusky | The same as Roosca and Roosky. |
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