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| Name. |
County. |
Meaning. |
| oooooooooooooooooooo | ooooooooooooooo | |
| Faddan | Feadan, a small brook. | |
| Faha | Fahy; an exercise green. See Faithche in Vocabulary. | |
| Farnagh | Farnane, Farnoge a place of Fearns [Farns], or alders. | |
| Farney | Co Monaghan | Fearnmhagh (Farnvah), Book of R., the alder plain (fearn and magh). |
| Farran | Fearann, land. | |
| Farset | Farsid; Fearsad, a sandbank in a river. | |
| Fartagh | Fertagh; a place of graves (feart). | |
| Fasagh | Fassagh; a wilderness (Fasach). | |
| Fassadinin | Co Kilkenny | The fasagh or wilderness of, or near, the river Dinin. |
| Feagh | Fiodhach [Feeagh], a woody place (fidh}. | |
| Fearmore | Great grass (feur) or grassy place. | |
| Feddan | The same as Faddan. | |
| Feenagh | Fiodhnach [Feenagh], woody (fidh]; a woody place. | |
| Feighcullen | Co Kildare | Fiodh-Chuilinn, F. M., Cullen's wood. |
| Fenagh | The same as Feenagh. | |
| Fennor | Fionnabhair [Finner], F. M., white field. | |
| Fermanagh | So called from the tribe of Fir-Monach, (O'Dugan), the men of Monach, who were originally a Leinster tribe, so named from their ancestor, Monach, fifth in descent from Cahirmore, monarch of Ireland from A.D. 120 to 123. | |
| Fermoy | Co Cork | Feara-muighe [Farra-moy], O'Dugan, the men of the plain. |
| Fermoyle | Formaeil, a round hill. | |
| Fernagh | Ferney; same as Farnagh. | |
| Ferns | Fearna [Farna], F. M., alders, a place abounding in alders: English plural termination added. | |
| Ferrard | Barony of, in Louth; Feara-arda [Farra-arda], F. M., the men of the height, i. e. of Slieve Bregh. | |
| Fethard | Fiodh-ard [Feeard], F. M., high wood. | |
| Fews | Baronies of, in Armagh; Feadha [Fa], F. M., woods; with the English plural termination added. Fews in Waterford has the same origin. | |
| Fiddan | Fiddane, Fiddaun; same as Faddan. | |
| Fiddown | Co Kilkenny | Fidh-duin [Feedoon], F. M., the wood of the dun or fort. |
| Fingall, | A district lying north of Dublin, in which the Danes settled; and hence it was called Fine-Gall (O'C. Gal.), the territory or tribe (fine) of the Galls or foreigners. | |
| Finglas | Clear stream (fionn, white, clear; and glaise). | |
| Finn river | And lake in Donegal; Loch-Finne, the lake of Finna, a woman, about whom there is an interesting legend. The river took its name from the lake. See Origin and History of Irish Names of Places, page 167. | |
| Finnea | Co Westmeath | Fidh-an-atha, [Fee-an-aha] F. M., the wood of the ford. |
| Fintona | Fionn-tamhnach [Fintowna], F. M., fair coloured field. | |
| Foil | Faill, a cliff. | |
| Foilduff | Back cliff. | |
| Forenaght | Forenaghts, Fornaght, Farnaght; For-nocht, a bare, naked, or exposed hill. | |
| Formil | Formoyle, Formweel; same as Fermoyle. | |
| Forth | The descendants of Ohy Finn Fothart [Fohart], brother of Conn of the hundred battles (king of Ireland from A.D. 123 to 158), were called Fotharta [Foharta], Book of R. Some of them settled in the present counties of Wexford and Carlow, where the two baronies of Forth still retain their name. | |
| Foy | Foygh; forms of Faithche. See Faha. | |
| Foybeg | Foymore; little and great exercise green. | |
| Foyduff | Black exercise green. | |
| Foyle | Same as Foil. | |
| Freagh | Freugh; Fraech, heath, a heathy place. | |
| Freaghduff | Freeduff; black heath. | |
| Freaghillan, | Freaghillaun; heathy island (oilean). | |
| Freshford | Irish name Achadh-ur (Book of Leinster), which should have been translated Freshfield: Achadh was mistaken for ath. | |
| Freughmore | Freaghmore; great heath. | |
| Funcheon | Fuinnseann [Funshin], the ash tree: the ash-producing river. | |
| Funshin | Funshinagh, Funshog, Funshoge; a place producing ash trees (fuinnse). |
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