Fleetwood / They were "Adventurers" who in 1587 were granted 12,000 acres in Co. Cork & Co. Waterford - Munster / In the 17th Century as followers of Cromwell they also received land grants in Co. Meath & Co. Kildare - Leinster / Some of the branches eventually became Irish Catholics & Irish Nationalists.

Fleming or Flemish or Flanders / man of Flanders / Gaelicized as Pleamonn / They came after the Anglo - Norman Invasion in 1170 and became the Lords of Slane in Co. Meath & Co. Louth - North East Leinster / They also came as Planters after 1614 from Scotland and were also in Co. Mayo - Mid Western Connacht & Co. Cavan - Southern Ulster / They were English Barons in Co. Meath / English Viscounts in Co. Longford - North West Leinster.

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

Flinter / English origins / They were at Carlingford in Co. Louth - North East Leinster in 1499 but most came later in the 17th Century and were in Co. Kildare & Co. Wicklow - Southern Leinster.

O & Mac Flood or Mac Attilla or Mac Tully / Irish - Ui & Mheic Maoltuile - descended from a son of Maoltule abbreviated later as Mheic an Tuile - Mheic Tuile / A Heremonian Cu Corb Sept - Family branch of the Ui Mail / *97.Maoltule was also the father of 98.Fianamail the 11th Heremonian Ui Mail Ui Theig King of Leinster. *84.Cu "Corb."

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

Floody / Used as a variant for Flood, which see, in Co. Cavan - Southern Ulster & Co. Louth - North East Leinster.

O Florry / Irish - Ui / A Sept - Family branch who had their territory in Co. Down - South East Ulster.

Floyd / Used as a variant of Lloyd, which see and synonymous with Flood, which see / They are to be mainly found in Munster.

O Flynn or Flyng / Irish - Ui Floinn - Ui Fhlainn - flann - red or ruddy / A Heremonian Sept - Family branch of the Muscraige Ui Fhloinn Tuath - Family region who were the Chiefs of Muskerrylinn - Muiscre Ui Fhloinn who had their territory inin Co. Cork - Southern Munster . 70.Eochy - Cairbre "Riada."

O Flynn / Irish - Ui Floinn - Ua Fhlainn / An Ithian Sept - Family branch of the Corca Laoidhe Tuath - Family region who were the Chiefs there in their territory in Co. Cork - Southern Munster  *35.Ith.

O Flynn / Irish - Ui Floinn / A Heremonian Dal Cuinn Ui Briuin Sept - Family branch who had their territory at Castlerea in the north of Co. Roscommon - Eastern Connacht 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 originally there also who were connected to the original Wilde who in 1759 married the daughter of "The O Flynn" from Loch O Flynn / There are 80,000 acres of bog there. *87.Brion.

O Flynn / Irish - Ui / An Erenagh Sept - Family branch who had their territory in Northern Connacht.

O Flynn / Irish - Ui / An Erenagh Sept - Family branch who had their territory on the shores of Loch Conn in North West Connacht.

O Flynn or Lynn, which see / Irish - Ui Floinn / A Sept - Family branch who had their territory around Loch Neagh to the Irish Sea in the south of Co. Antrim - North East Ulster where they were Chiefs & Kings.

O Flynn / A Sept - Family branch who are descended from Damnat - fawn - pro. Dav - nit, the wife of 85.Aed "Bennan" the 9a Eoghanachta Locha Lein King of Munster / She is also the ancestress of the O Cahills, O Carrolls & O Moriartys in Co. Kerry - South West Munster.

O Flynn / Irish - Ui / A Sept – Family branch who had their territory in Co. Clare - North West Munster.

O Flynn / Irish - Ui / A Sept - Family branch who had their territory in Co. Mayo - Mid Western Connacht.

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