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List all families
List all families
- O
- O'Beirne (Dangan)
- A Gaelic family located in the north east of county Roscommon who lost most of their lands in the 17th century. Estates:
- O'Beirne (Drumsna)
- Estates:
- O'Beirne (Gorteen)
- Estates:
- O'Beirne (Sligo)
- Estates:
- O'Beirne/Byrne/Burns (Tinny Park)
- See O'Beirne of Drumsna. Estates:
- O'Brien (Ardfort)
- Estates:
- O'Brien (Assolas)
- Estates:
- O'Brien (Ballynalackan)
- Estates:
- O'Brien (Birchfield)
- http://www.clarelibrary.ie/eolas/coclare/people/cornelius_obrien/genealogy.htm Estates:
- O'Brien (Cahermoyle)
- Estates:
- O'Brien (Carlow)
- Estates:
- O'Brien (Carrigallen)
- Estates:
- O'Brien (Condons & Clangibbon)
- Estates:
- O'Brien (Dromoland) (Baron of Inchiquin)
- Estates:
- O'Brien (Ennistymon)
- Estates:
- O'Brien (Fairfield)
- Estates:
- O'Brien (Fairy Hill)
- Estates:
- O'Brien (Fanore)
- Estates:
- O'Brien (Garrykennedy)
- Estates:
- O'Brien (Glencolumbkille)
- Estates:
- O'Brien (Imokilly)
- Estates:
- O'Brien (Inchiquin Castle) (Baron Inchiquin, Earl of Inchiquin, Marquess of Thomond)
- Estates:
- O'Brien (Kilcor)
- Estates:
- O'Brien (Limerick)
- Estates:
- O'Brien (Mohill)
- Estates:
- O'Brien (Parkview)
- Estates:
- O'Brien (Rockfield)
- Estates:
- O'Brien (Thomond) (Earl of Thomond)
- Estates:
- O'Brien (Tinnekilly)
- Estates:
- O'Brien (Uskane)
- Estates:
- O'Brien/Stafford O'Brien
- Estates:
- O'Byrne
- Estates:
- O'Callaghan (Viscount & Baron Lismore)
- Estates:
- O'Callaghan (Ballinahinch)
- Estates:
- O'Callaghan (Caherduggan)
- Estates:
- O'Callaghan (Clonmeen)
- Estates:
- O'Callaghan (Kilshannig)
- Estates:
- O'Callaghan (West Cork)
- Estates:
- O'Callaghan/O'Callaghan Westropp (Kilgory & Maryfort)
- Estates:
- O'Carroll
- Estates:
- O'Connell
- Estates:
- O'Connell (Barryscourt)
- Estates:
- O'Connell (Flintfield)
- Estates:
- O'Connell (Grena)
- Estates:
- O'Connell (Kilgory)
- Estates:
- O'Connor
- Roadstown Estates:
- O'Connor (Clanmaurice)
- Estates:
- O'Connor (Corsallagh)
- Estates:
- O'Connor (Sligo)
- Estates:
- O'Connor (Trughanacmy)
- Estates:
- O'Connor (Tuam)
- Estates:
- O'Connor Blake
- O'Connor/O'Connor-Henchy
- Estates:
- O'Conor (Ballagh)
- Estates:
- O'Conor (Dundermott)
- Estates:
- O'Conor (Milltown)
- A branch of the O'Conors of Dundermott. Estates:
- O'Conor (Mount Druid)
- Estates:
- O'Conor (Toomona)
- Estates:
- O'Conor Donelan
- Estates:
- O'Conor/O'Conor Don
- Estates:
- O'Dell (Waterford)
- Estates:
- O'Dell/Odell
- Estates:
- O'Donel
-
One branch of the family who served in the army of the Austrian Empire lived at Newcastle, near Swineford, Co Mayo at the end of the 18th century.
Estates:
- Mostyn
- O'Donel (Newcastle)
- Holmes
- O'Donel
- Clive (Croy Lodge)
- Jameson (Cong)
- Stanuell
- McNamara (Cong)
- Brassey
- Kelly (Skerdagh)
- McHale
- Pike
- Birch
- Pim
- Arbuthnot
- Achill Mission
- Stuart
- O'Malley (Newcastle)
- McLoughlin
- Ashworth (Co Mayo)
- Medlycott
- Anderson (Cross)
- Clive (Rock House)
- O'Donnell (Kilcommon Erris)
- Simes
- O'Donnell (Boyle)
- Estates:
- O'Donnell (Kilcommon Erris)
- Estates:
- O'Donnell (Kilsheelan)
- Estates:
- O'Donnell (Larkfield)
- Estates:
- O'Donnell (Swineford)
- Estates:
- O'Donnell (Trough)
- Estates:
- O'Donoghue (The O'Donoghue of the Glens)
- Estates:
- O'Donovan (The O'Donovan)
- Estates:
- O'Donovan (East Carbery)
- Estates:
- O'Donovan (Kilcrohane)
- Estates:
- O'Dowd
- The O'Dowds, once extensive landowners in Co Mayo, were dispossed by Cromwell, but retained some lands around Bunnyconnellan. Estates:
- O'Dowd (Tully)
- Estates:
- O'Driscoll (West Carbery)
- Estates:
- O'Dwyer (Caher)
- Estates:
- O'Dwyer (Co Tipperary)
- Estates:
- O'Dwyer (Kilmurry)
- Estates:
- O'Farrell (Youghal)
- Estates:
- O'Flahertie (Lemonfield)
- Estates:
- O'Flaherty (barony of Longford)
- Estates:
- O'Flaherty (Knockbane)
- Estates:
- O'Flaherty (Lisdonagh)
- Estates:
- O'Flaherty (Renvyle)
- Estates:
- O'Gorman (Belleview)
- Estates:
- O'Gorman (Buncraggy)
- Estates:
- O'Gorman (Ennis)
- Estates:
- O'Grady (Abbeyfeale)
- Estates:
- O'Grady (Aghamarta)
- Estates:
- O'Grady (Cahir Guillamore) (Viscount Guillamore)
- Estates:
- O'Grady (Castle Garde)
- Estates:
- O'Grady (County Cork)
- Estates:
- O'Grady (Errina)
- Estates:
- O'Grady (Kilballyowen)
- Estates:
- O'Grady (Kilchreest)
- Estates:
- O'Grady (Lismoyle)
- Estates:
- O'Grady (Tavraun)
- Estates:
- O'Grady (The Grange)
- Estates:
- O'Grady/Grady (Belmont)
- Estates:
- O'Grady/Grady (Elton)
- Estates:
- O'Grady/Grady (Glendalough)
- Estates:
- O'Grady/Grady (Graffin)
- Estates:
- O'Grady/Grady (Landscape)
- Estates:
- O'Halloran
- Estates:
- O'Hara (Baron Tyrawley)
- Sir Charles O'Hara, created Baron Tyrawley in 1706, and his son James 2nd Baron both had distinguished military careers in the wars on the continent of Europe in the 18th century. The title became extinct with the death of the 2nd Baron in 1774. Estates:
- O'Hara (Annaghmore)
- Estates:
- O'Hara (Ballyara & Corsallagh)
- Estates:
- O'Hara (Caher)
- O'Hara (Lenaboy)
- Estates:
- O'Hara (Raheen)
- Estates:
- O'Hare
- Estates:
- O'Hea
- Estates:
- O'Heney/Heney
- Estates:
- O'Keeffe
- Estates:
- O'Keeffe (Waterford)
- Estates:
- O'Kelly (Clonina)
- Estates:
- O'Kelly (Creeraun)
- Estates:
- O'Kelly (Fairfield)
- Estates:
- O'Kelly (Gallagh & Ticooly)
- Estates:
- O'Leary (Cork)
- Estates:
- O'Loghlen (Baronet)
- Estates:
- O'Mahony (Templevally)
- Estates:
- O'Malley (Ballynalacka)
- Estates:
- O'Malley (Eden)
- A Catholic legal family, some members were involved in the Rising of 1798. Estates:
- O'Malley (Galway)
- Estates:
- O'Malley (Hawthorn)
- Descended from the Belclare branch of the O'Malleys. Estates:
- O'Malley (Kilboyne)
- The Kilboyne, Spencer Park and Newcastle branches of the O'Malley family were descended from Owen O'Malley of Burrishoole (1650-1738)and his wife Martha Browne of the Neale. Estates:
- O'Malley (Newcastle)
- O'Malley family of Spencer Park, Castlebar and of Newcastle, Swineford, Co Mayo. Estates:
- O'Meagher
- Estates:
- O'Meara
- Estates:
- O'Neill
- A branch of the O'Neills of the Fews, county Armagh. Estates:
- O'Neill (Ballyduff)
- Estates:
- O'Reilly (Colmanstown)
- Estates:
- O'Reilly (Heath House)
- Kilshalvy Estates:
- O'Reilly (Kildangan)
- Estates:
- O'Reilly Dease
- Estates:
- O'Rorke (Clonbern & Bermingham)
- The descendants of the Reverend John O'Rorke, a Protestant clergyman, who acquired land in the Tuam area of county Galway. Lady Molly Cusack Smith,the first lady Master of the Galway Blazers,was a member of this family. Estates:
- O'Rorke (Oldcastle)
- Estates:
- O'Ryan (Bansha Castle)
- Estates:
- O'Shaughnessy
- Estates:
- O'Shaughnessy (Gort)
- Estates:
- O'Shea (Limerick)
- Estates:
- O'Shea (Rennies)
- Estates:
- O'Sullivan
- James O'Sullivan married Mary Moore one of the co heiresses of the Moore estate in the parish of Drum, barony of Athlone, county Roscommon, in the mid 18th century. They had one son John, who had 3 sons James, Patrick and John. Patrick married Jane De Burgh in 1802 and his younger brother John married Dorothea Delaney. Estates:
- O'Sullivan (East Carbery)
- Estates:
- O'Sullivan (Limerick)
- Estates:
- O'Sullivan (West Cove)
- Estates:
- O'Sullivan Beare
- Estates:
- Ogilby
- Estates:
- Ogilvie
- Estates:
- Oldfield
- Estates:
- Oliver (Castle Oliver)
- Estates:
- Oliver (Cos Galway & Leitrim)
- Estates:
- Oliver (Inchera & Dunkettle)
- Estates:
- Oliver (Kerry & Cork)
- Estates:
- Olpherts
- Estates:
- Onge
- Estates:
- Orme (Abbeytown & Glenmore)
- The Ormes settled in the parish of Crossmolina early in the 18th century. A younger son of this branch of the Orme family married into the Knoxes of Rappa and lived at Glenmore, Crossmolina. His sisters married Samuel Handy and Godfrey Fetherstonhaugh. Estates:
- Orme (Ballycarron)
- Intermarried with the Mostyns of the Grange, Co Sligo and the Pagets of Knockglass, Co Mayo. Estates:
- Orme (Owenmore)
- Estates:
- Ormsby (Athlacca)
- Estates:
- Ormsby (Ballinamore)
- Elizabethan settlers located at first in county Sligo, from where they spread into counties Mayo, Roscommon and Galway. The Ballinamore branch were descended from the Ormsby of Comyn or Cummin in county Sligo. Estates:
- Ormsby (Bird Hill & Brookdale)
- Estates:
- Ormsby (Castle Dargan)
- Estates:
- Ormsby (Cummeen)
- Cummeen House, Sligo Estates:
- Ormsby (Farrenmacfarrell)
- Estates:
- Ormsby (Gortnaraby)
- A branch of the family of Ormsby descended from an Elizabethan settler. Estates:
- Ormsby (Rinagry)
- Possibly a junior branch of the Gortnaraby family. Estates:
- Ormsby (Rocksavage)
- Estates:
- Ormsby (Tireragh)
- Estates:
- Ormsby (Tobervaddy, Shrulegrove & Grange)
- Estates:
- Ormsby (Tobervaddy, Shrulegrove & Grange)
- Ormsby Gore (Baron Harlech)
- Estates:
- Ormsby Ruttledge
- Estates:
- Orpen (Elm Park)
- Estates:
- Orpen (Glanarought)
- Estates:
- Orpen (Killaha Castle)
- Estates:
- Orpen (Marston)
- Orpen/Orpin (Cos Cork & Waterford)
- Estates:
- Orr
- Estates:
- Osborne (Baronet)
- Estates:
- Osborne
- Estates:
- Oswald
- Estates:
- Otway
- Estates:
- Ouseley
- Estates:
Email: info@landedestates.ie.
Landed Estates Database, 1.2.7b2, 18 May 2011, Phase II beta