O Fodaghan or Swift - Irish / Ua Fuadachain. Cognate with Foody, Both were later anglicized as Swift, which see. A Sept / Family branch, who had their territory in Co. Cavan and Co. Monaghan in Southern Ulster.

Fodha / fada / long. Synonymous with Long, which see.

O Fogarty. A Heremonian U Cobhthaigh Dal Cuinn Colla da Crioch Sept / Family branch. Ancestors - *85.Murray / Muiredach "Colla da Crioch" / "Focrith" - of the Two Countries,*84.Eochy / Echu "Doimhlen," *83.Cairbre "Liffeachair" the 116th King of Tara / Ireland.

O Fogarty - Irish / Ua Fhogartaigh - fogartach / expelling. A Heberian Dal gCais Sept / Family branch, who had their territory in the Barony of Eliogarty in Co. Tipperary in the north - east of Ormond / Aur Mhumhain / Eastern Munster. Ancestor - *91.Cas (Dal gCais) the King of Thomond.

Mac Foland or Mac Fallon or Mac Folan or Mac Folane - Irish / Mheic Fualain. An Irian Conmaicne Mara Brehon Sept / Family branch, who had their territory in the Connemara in the west of Co. Galway in the Connacht Province. Kinsmen to O Kealy / O Queally, O Devany / Ui Dubhain. Especially see - O Folan.

Mac Folan or Mac Fallon or Mac Foland or Mac Folane / Mheic Fualain. An Irian Conmaicne Mara Brehon Sept / Family branch, who had their territory in the Connemara in the west of Co. Galway in the Connacht Province. Kinsmen to O Kealy / O Queally, O Devany / Ui Dubhain. They had their territory in the Connemara in the west of Co. Galway in the Connacht Province. Ancestors - *79.Conmacc / Conmac the direct ancestor of the (Conmaicne) Septs, *78.Oirbsen "Mor" /  Orsenmar after whom Loch Oirbsen is named,- *64.Fergus mac Roich, *63.Ros "Ruadh," the King of Ulster, *62.Rory "Mor" the 86th King of Tara / Erinn, *37.Ir (Irians). Mac Folan used close by in Co. Mayo in the mid - west of Connacht.

Folan. Used as a synonym for Fallon, which see, in the Connacht Province in "O Fallon’s Country."

Mac Folane or Mac Foland or Mac Fallon or Mac Folan - Irish / Mheic Fualain. An Irian Conmaicne Mara Brehon Sept / Family branch - who had their territory in the Connemara in the west of Co. Galway in the Connacht Province. Kinsmen to O Kealy / O Queally, O Devany / Ui Dubhain.  Especially see - O Folan.

O Foley - Irish / Ua Foghladha - foghlaidh / marauder or plunderer. A Sept / Family branch, who had their territory in Co. Waterford in the south - east of the Munster Province and who were also in Co. Kerry in Iar Mhumhain / Western Munster.

Foley. Used also as a synonym for Sharry - Irish / Mheic Searraigh, which see.

Folliot - follet / gay. French English origins. They were in Co. Dublin in the north - east of Southern Leinster and Clonmel in Co. Tipperary in the north - east of Ormond / North Eastern Munster in 1409 AD. Some also came later with the Confiscation of the 3,500,000 acres of the Heremonian Ui Cobhthaigh Dal Cuinn  "Northern" Ui Niaill territories in the Ulster Province and the Foreign non - Catholic Plantations there and were also in Co. Donegal in the north - west of Ulster.

O Foody or O Foudy - Irish / Ua Fuadaigh - fudach / plundering. A Sept / Family branch, who had their territory in Co. Mayo in the mid - west of the Connacht Province. Also changed to Swift and Speed, which see.

O Foran - Irish / Ua Furain. A Sept / Family branch, who had their territory in Co. Limerick and Co. Waterford in the Munster Province. Also changed to Ford.

Forbes. Used to anglicize Mac Firbis, which see. Pronounced Forbis in Co. Clare in the north - west of Thomond / Northern Munster.

Forbes. Scottish origins. They were in Co. Longford in the north - west of Northern Leinster.

Ford or Forde - Irish / Mac Ghiolla na Naomh (Descended from a son of the follower of the Saints.) A Sept / Family branch, who had their territory in Southern Connacht.

Ford - Irish / Mheic Giolla Arnath. A Sept / Family branch, who had their territory in the south of the Connemara in Co. Galway in Southern Connacht.

Forde or Ford or Mac Kinnawe - Irish / Mheic Conshnamha - consnaval - conshnamah / swimming dog. A Sept / Family branch, who had their territory in a part of Co. Leitrim in Northern Connacht where they were Chiefs from the 13th Century AD and Chiefs of Muintir Kenny.

O Forde or O Foran - Irish / Ua Fuarain - fuar / cold. A Sept / Family branch, who had their territory in Co. Cork in Desmond / Des Mhumhain / Southern Munster.

Fore -

O Forhane or O Forahan - Irish / Ua Fuarthain. Original forms of Foran used in Co. Kerry in the south west of Iar Mhumhain / Western Munster and nearby in the west of Co. Cork in Desmond / Des Mhumhain / Southern Munster.

O Forkin or O Forkan - Irish / Ua Gabhlain - gabhal / fork. A Sept / Family branch, who had their territory in Co. Galway and Co. Mayo in the south - west of the Connacht Province.

Forestal or Forrestal / paddock. Anglo Norman origins. They were in Co. Kilkenny in the south - west of Southern Leinster.

Forlong. See - Furlong.

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