Fleetwood. They were "Adventurers" who in 1587 AD were granted 12,000 acres in Co. Cork and Co. Waterford in the east of the Munster Province. In the 17th Century AD as followers of the Oliver Cromwell Invasion they also received land grants in Co. Meath in the south - east of Northern Leinster and Co. Kildare in Central Southern Leinster. Some of their branches eventually became Irish Catholics and Irish Nationalists.

Fleming or Flemish or Flemyng or Flanders (man of Flanders) Gaelicized as Pleamonn. They came after the Anglo - Norman Invasion in 1170 AD and became the Lords of Slane in Co. Meath and nearby in Co. Louth in the north - east of Northern Leinster. They also came as Planters after 1614 AD from Scotland and were also in Co. Mayo in the mid - west of the Connacht Province and Co. Cavan in Southern Ulster. They were English Barons in Co. Meath and English Viscounts in Co. Longford in the north - west of Northern Leinster.

Fleury. Used as synonym for Furey, which see, in Co. Galway in Southern Connacht.

O / Mac Flood or Mac Attilla or Mac Tully - Irish / Ua / Mheic Maoltuile (Descended from a son of Maol Tule) abbreviated later as Mheic an Tuile / Mheic Tuile. A Heremonian Ui Laoghaire Ui Lughaidh Cu Corb Ui Mail Sept / Family branch. *99.Mael "Tuile was also the father of 98.Fianamail the Heremonian Ui Laoghaire Cu Corb Ui Mail Ui Theig 11th King of Leinster. Ancestors - *99.Mael "Tuile," *98.Ronan "Crach," *97.Aed "Dibchine" the 6a King of Leinster, *96.Senach "Dibech," *95 Cairthenn "Muach," *94.Eterscel, *93.Angus / Oengus "Ailche," *92.Fergus "Forcraid," *91.Toole / Tuathal "Tigech," *90.Maine "Mal" (Ui Mail  / Ui Theig),*89.Felim / Feidlimid "Fer Aurglas," *88.Corbmac "Gelta Gaeth," *87.Nia "Corb,"*84.Cu "Corb."

Flood / Llwyd / grey. Welsh origins. In certain regions of the Ulster Province used for Floyd.

Floody. Used as a variant for Flood, which see, in Co. Cavan in Southern Ulster and nearby in Co. Louth in the north - east of Northern Leinster.

O Florry. A Sept / Family branch, who had their territory in Co. Down in the south - east of the Ulster Province.

Flotter -

O Flynn or O Flyng - Irish / Ua Floinn / Ua Fhlainn - flann / red or ruddy. A Heremonian Ui Cobhthaigh Ui Conaire Muscraige Ui Fhloinn Sept / Family branch who were the Chiefs of Muskerrylinn / Muiscre Ui Fhloinn, who had their territory in Co. Cork in Desmond / Southern Munster. Ancestors - 69.Conaire 11 the 111th King of Tara / Ireland (Ui Conaire), *68.Mogh “Lamha,” *67.Fiachaidh “Fear Mara,” *66.Angus / Oengus "Teamhrach" / "Tuireach Tamach" - the Ruler of Tara the 81st King of Tara / Erinn, *60.Coffey / Cobhthach the 69th King of Tara / Erinn (Ui Cobhthaigh), *37.Heremon (Heremonians).

O Flynn - Irish / Ui Floinn / Ua Fhlainn. An Ithian Corca Loigde Sept / Family branch  who were the Chiefs there in their territory in Co. Cork in Desmond / Des Mhumhain / Southern Munster.  Ancestors - *36.Lewy / Lughaidh, *35.Ith (Ithians).

O Flynn - Irish / Ui Floinn. A Heremonian Ui Cobhthaigh Dal Cuinn Ui Briuin Sept / Family branch, who had their territory at Castlerea in the north of Co. Roscommon in the east of the Connacht Province where they were Kings. The Mac Egan castle ruins are on the way out of the town of Ballinlough and Loch O Flynn from which the River Suck begins. Wills Estate was originally there also who were connected to the original Wilde who in 1759 AD married the daughter of "The O Flynn" from Loch O Flynn. There are 80,000 acres of bog there. Ancestors - *87.Brion the original 1st King of Connacht (Ui Briuin), *86.Eochy / Eochaidh "Mugmedon" the 124th King of Tara / Ireland.

O Flynn. An Erenagh Sept / Family branch, who had their territory in the north of the Connacht Province.

O Flynn. An Erenagh Sept / Family branch, who had their territory on the shores of Loch Conn in the north - west of the Connacht Province.

O Flynn or O Lynn, which see - Irish / Ua Fhloinn. An most important Heremonian Ui Cobhthaigh Dal Cuinn 3 Colla Uais Ui Mheic Uais Ui Tuitre Sept / Family branch, who had their territory in the west of Loch Neagh in Co. Tyrone in Central Southern Ulster to the Irish Sea in the south of Co. Antrim in the north - east of the Ulster Province and north - west of the loch at Loughinsholin in Co. Derry where they were Chiefs and Kings. Kinsmen to O Donnellan / O Donelan, O Furphy / O Furfie / O Furphey / O Furvey / Ui Foirbhithe, O Hood / O Houd / O Hude / O Mahood / Ohoud / Mac Hood / Ui hUid, O Mulrooney / O Mulroney / O Murrony / Ui Mael Ruanaidh. Ancestors - *101.Floind (Ui Loind), *100.Murray / Muiredach, *99.Indrechtach, *98.Reachtabrat, *97.Mailcraibhi, *96.Maoilfothartaigh, *95.Sweeney / Suibhne, *94.Furadhran, *93.Becc, *92.Cuanach, *91.Dairi, *90.Felim / Feidlimid, *89.Fechin, *88.Fiachrach, *87.Tuirtri, *86.Eochy / Eachach, *85.Caroll / Carioll Colla "Uais" the 121st King of Tara / Ireland, *84.Eochy / Echu "Doimhlen," *83.Cairbre "Liffeachair" the 116th King of Tara / Ireland.

O Flynn. A Sept / Family branch who are descended from (Damnat / fawn - pro. Davnit,) the wife of 85.Aed "Bennan" the Heberian Eoghanacht Locha Lein 9a King of Cashel / Munster who is also the ancestress of the O Cahills, O Carrolls and O Moriartys in Co. Kerry in Iar Mhumhain / South Western Munster.

O Flynn. A Sept / Family branch who had their territory in Co. Mayo in the mid - west of the Connacht Province.

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