Surnames Starting with O

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OAKLEY     English
From a place name meaning "oak clearing" in Old English. It was borne by American sharpshooter Annie Oakley (1860-1926).
OBAMA     Eastern African, Luo
From a rare Luo given name, based on a word meaning "crooked" or "slightly bent". It was possibly originally given to a baby who had an arm or leg that looked slightly bent immediately after birth. It could also possibly have been given to a child who was born in the breech position.
OBANDO     Spanish
Habitational name for someone who lived in Obando in Extremadura, Spain.
Ó BAOGHILL     Irish
Irish Gaelic form of BOYLE.
O'BEIRNE     Irish
Variant of O'BYRNE.
O'BERNE     Irish
Variant of O'BYRNE.
OBERST     German
Means "from the uppermost end of a village, top of a house" from Middle High German ober, obar.
OBERTI     Italian
Derived from the given name UBERTO.
OBERTO     Italian
Derived from the given name UBERTO.
O'BOYLE     Irish
Variant of BOYLE.
Ó BRÁDAIGH     Irish
Irish Gaelic form of BRADY.
Ó BRADÁIN     Irish
Irish Gaelic form of BRADEN.
Ó BRAOIN     Irish
Irish Gaelic form of BREEN.
Ó BRAONÁIN     Irish
Irish Gaelic form of BRENNAN.
Ó BRIAIN     Irish
Irish Gaelic form of O'BRIEN.
O'BRIAN     Irish
Variant of O'BRIEN.
O'BRIEN     Irish
From the Irish Ó Briain meaning "descendant of BRIAN".
Ó BROIN     Irish
Irish Gaelic form of O'BYRNE.
Ó BUACHALLA     Irish
Irish Gaelic form of BUCKLEY (2).
O'BYRNE     Irish
Anglicized form of Irish Ó Broin meaning "descendant of BRAN (1)".
Ó CAISIDE     Irish
Irish Gaelic form of CASSIDY.
O'CALLAGHAN     Irish
Variant of CALLAGHAN.
Ó CAOIMH     Irish
Irish Gaelic form of KEEFE.
Ó CAOIMHÁIN     Irish
Irish Gaelic form of CAVAN.
Ó CAOINDEALBHÁIN     Irish
Irish Gaelic form of QUINLAN.
Ó CATHÁIN     Irish
Means "descendant of CATHÁN".
Ó CATHASAIGH     Irish
Irish Gaelic form of CASEY.
Ó CEALLACHÁIN     Irish
Irish Gaelic form of CALLAGHAN.
Ó CEALLAIGH     Irish
Irish Gaelic form of KELLY (1).
Ó CEARMADA     Irish
Irish Gaelic form of CARMODY.
Ó CEITHEARNAIGH     Irish
Irish Gaelic form of KEARNEY.
OCHOA     Basque, Spanish
From a Basque nickname meaning "wolf".
Ó CIARDHA     Irish
Irish Gaelic form of CAREY.
Ó CINNÉIDIGH     Irish
Irish Gaelic form of KENNEDY.
Ó CLÉIRIGH     Irish
Means "descendant of the clerk" in Irish.
O'CLERY     Irish
Anglicized form of Ó CLÉIRIGH.
Ó CNÁIMHÍN     Irish
Means "descendant of Cnámh", Cnámh being a nickname meaning "bone".
Ó COCHLÁIN     Irish
Means "descendant of Cochlán", where the given name Cochlán is derived from Irish cochal "cape" or "hood". This surname originated in County Cork, Ireland.
Ó COIGLIGH     Irish
Irish Gaelic form of QUIGLEY.
Ó COILEÁIN     Irish
Means "descendant of COILEAN" in Irish.
Ó CONAILL     Irish
Irish Gaelic form of CONNELL.
Ó CONCHOBHAIR     Irish
Irish Gaelic form of O'CONNOR.
Ó CONGHALAIGH     Irish
Irish Gaelic form of CONNOLLY.
O'CONNELL     Irish
Variant of CONNELL.
O'CONNOR     Irish
From Irish Ó Conchobhair meaning "descendant of CONCHOBHAR".
Ó CORCRÁIN     Irish
Irish Gaelic form of CORCORAN.
Ó CORRAIDHÍN     Irish
Irish Gaelic form of CURRAN.
Ó CUANA     Irish
Irish Gaelic form of COONEY.
Ó CUIDIGHTHIGH     Irish
Irish Gaelic form of CODY.
Ó CUILINN     Irish
Means "descendant of Cuileann", Cuileann being a nickname meaning "holly".
Ó CUINN     Irish
Irish Gaelic form of QUINN.
Ó DÁLAIGH     Irish
Irish Gaelic form of DALY.
Ó DAMHÁIN     Irish
Means "descendant of DAMHÁN".
ODELL     English
Originally denoted a person who was from Odell (Bedfordshire), England.
Ó DEORÁIN     Irish
Irish Gaelic form of DORAN.
Ó DÍOMASAIGH     Irish
Irish Gaelic form of DEMPSEY.
Ó DOCHARTAIGH     Irish
Irish Gaelic form of DOHERTY.
Ó DOIBHILIN     Irish
Irish Gaelic form of DEVLIN.
Ó DOIRNÁIN     Irish
Irish Gaelic form of DURNIN.
Ó DOMHNAILL     Irish
Irish Gaelic form of O'DONNELL.
Ó DONNCHADHA     Irish
Irish Gaelic form of DONOGHUE.
Ó DONNDUBHÁIN     Irish
Irish Gaelic form of DONOVAN.
O'DONNELL     Irish
Anglicized form of Irish Ó Domhnaill meaning "descendant of DOMHNALL".
Ó DONNGHAILE     Irish
Irish Gaelic form of DONNELLY.
O'DOYLE     Irish
Variant of DOYLE.
Ó DUBHÁIN     Irish
Means "descendant of DUBHÁN".
Ó DUBHGHAILL     Irish
Irish Gaelic form of DOYLE.
Ó DUBHSHLÁIN     Irish
Irish Gaelic form of DOLAN.
Ó DUBHSHLÁINE     Irish
Gaelic form of DELANEY (2).
Ó DUBHTHAIGH     Irish
Irish Gaelic form of DUFFY (1).
OELBERG     German
Means "oil hill" from the Germanic oel "oil" and berg "hill".
Ó FAOLÁIN     Irish
Irish Gaelic form of WHELAN.
Ó FEARGHAIL     Irish
Irish Gaelic form of FARRELL.
OFFERMANS     Dutch
From the Dutch occupation offerman, the man who collects ofer "money", in a church.
Ó FIONNAGÁIN     Irish
Irish Gaelic form of FINNEGAN.
Ó FIONNÁIN     Irish
Irish Gaelic form of FANNON.
Ó FLANNAGÁIN     Irish
Irish Gaelic form of FLANAGAN.
Ó FLOINN     Irish
Irish Gaelic form of FLYNN.
Ó FRIGHIL     Irish
Irish Gaelic form of FRIEL.
Ó GALLCHOBHAIR     Irish
Irish Gaelic form of GALLAGHER.
OGDEN     English
Means "(dweller in the) oak valley" from Old English âc "oak" and denu "valley".
OGNIANOV     Bulgarian
Variant transcription of OGNYANOV.
OGNYANOV     Bulgarian
Means "son of OGNYAN".
Ó GORMÁIN     Irish
Irish Gaelic form of GORMAN (2).
O'GORMAN     Irish
Variant of GORMAN (2).
OGTROP     Dutch
Originally denoted a person who was from the town of Ochtrup in Germany, which is of uncertain origin.
Ó HALLMHURÁIN     Irish
Irish Gaelic form of HALLORAN.
O'HANEGAN     Irish
Variant of O'HANNAGAIN.
O'HANIGAN     Irish
Variant of O'HANNIGAIN.
O'HANNAGAIN     Irish
From Irish Ó hAnnagáin, which means "descendant of Annagán". The given name Annagán was a diminutive of Annadh meaning "delay".
Ó HANNAGÁIN     Irish
Irish Gaelic form of O'HANNAGAIN.
O'HANNAGAN     Irish
Variant of O'HANNAGAIN.
O'HANNEGAN     Irish
Variant of O'HANNAGAIN.
O'HANNIGAIN     Irish
Variant of O'HANNAGAIN.
O'HANNIGAN     Irish
Variant of O'HANNAGAIN.
Ó HAODHA     Irish
Irish Gaelic form of HAYES (2).
O'HARA     Irish
From the Irish Ó hEaghra, which means "descendant of Eaghra", Eaghra being a given name of uncertain origin. Supposedly, the founder of the clan was Eaghra, a 10th-century lord of Luighne. A famous fictional bearer of this surname is Scarlett O'Hara, a character in Margaret Mitchell's 'Gone With The Wind' (1936).
Ó HEACHTHIGHEARNA     Irish
Means "descendant of Eichthighearn", where the personal name Eichthighearn means "horse lord" in Gaelic.
Ó HEAGHRA     Irish
Irish Gaelic form of O'HARA.
O'HEARN     Irish
Anglicized form of Ó HEACHTHIGHEARNA.
Ó HÉIDEÁIN     Irish
Means "descendant of Éideán" in Irish. The given name Éideán is a diminutive of éideadh meaning "clothes, armour".
Ó HEIDHIN     Irish
Irish Gaelic form of HINES.
Ó HÉIDÍN     Irish
Means "descendant of Éidín" in Irish. The given name Éidín is a diminutive of éideadh meaning "clothes, armour".
Ó HEIDIRSCEÓIL     Irish
Irish Gaelic form of DRISCOLL.
Ó HÍCIDHE     Irish
Irish Gaelic form of HICKEY.
Ó HIFEARNÁIN     Irish
Irish Gaelic form of HEFFERNAN.
OHME     German
Means "uncle".
Ó HÓGÁIN     Irish
Irish Gaelic form of HOGAN.
Ó HUIGINN     Irish
Irish Gaelic form of HIGGINS.
OJEDA     Spanish
Originally a name for a dweller on the banks of the Ojeda river.
O'KANE     Irish
Anglicized form of Ó CATHÁIN.
O'KEEFE     Irish
Variant of KEEFE.
OLA     Spanish, Basque
Means "forge" or "shepherd's cabin" from the Basque ola.
OLANDER     Swedish
Denoted someone from the island of Öland, or a variant spelling of Ålander, which is a habitational name for someone from the island of Åland.
Ó LAOGHAIRE     Irish
Irish Gaelic form of O'LEARY.
OLASZ     Hungarian
Means "Italian" in Hungarian.
OLAYINKA     Western African, Yoruba
From the given name OLAYINKA.
Ó LEANNÁIN     Irish
Irish Gaelic form of LENNON.
O'LEARY     Irish
From Irish Ó Laoghaire meaning "descendant of LAOGHAIRE".
OLEASTRO     Spanish
Means "(dweller by the) wild olive tree".
OLESEN     Danish
Means "son of OLE".
OLGUIN     Spanish
Variant of HOLGUÍN.
OLHOUSER     Norwegian, English
Means "(dweller by or near the) old house".
OLIVER     Catalan, English, French, German, Scottish
Derived from the given name OLIVER.
OLIVERSEN     Norwegian
Norwegian form of OLIVERSON.
OLIVERSON     English
Means "son of OLIVER".
OLIVERSSON     Swedish
Swedish form of OLIVERSON.
OLIVIER     French
Derived from the given name OLIVIER.
OLMO     Spanish
Means "elm tree" in Spanish, ultimately from Latin ulmus. The name originally indicated a person who lived near such a tree.
OLMOS     Spanish
Variant of OLMO.
OLOFSDOTTER     Swedish
Means "daughter of OLOF".
OLOFSSON     Swedish
Means "son of OLOF".
Ó LOINGSIGH     Irish
Irish Gaelic form of LYNCH.
OLSEN     Danish
Means "son of OLE".
OLSON     Swedish, Danish
Anglicized form of OLSSON or OLSEN.
OLSSON     Swedish
Means "son of OLAF".
Ó LUAIN     Irish
Irish Gaelic form of LANE (3).
OLVIRSSON     Icelandic
Means "son of Óleifr", Óleifr is the ancient form of OLAF.
Ó MADAIDHÍN     Irish
Means "descendant of Madaihín", a given name derived from Irish madadh meaning "dog, mastiff".
Ó MÁILLE     Irish
Means "descendant of a nobleman" from the Irish Gaelic mál.
O'MALLEY     Irish
Anglicized form of Ó MÁILLE.
ÖMAN     Swedish
From the Swedish words ö meaning "island" and man meaning "man". Thus the meaning is "man from the island".
Ó MANACHÁIN     Irish
Irish Gaelic form of MONAHAN.
Ó MAOIL EOIN     Irish
Irish Gaelic form of MALONE.
Ó MAOIL RIAIN     Irish
Means "descendant of a follower of RÍAN", derived from Irish maol meaning "follower".
Ó MAOILSHEACHLAINN     Irish
Means "descendant of MAOLSHEACHLANN" in Irish.
Ó MAOLÁIN     Irish
Irish Gaelic form of MULLEN.
Ó MAOL AODHA     Irish
Means "descendant of a follower of Saint AODH". It is derived from Irish maol meaning "follower, servant".
Ó MAOL DHOMHNAIGH     Irish
Irish Gaelic form of MOLONEY.
Ó MAOLMHUAIDH     Irish
Means "descendant of Maolmhuadh", Maolmhuadh being a given name meaning "proud chief", derived from Gaelic maol meaning "chief" and muadh meaning "proud, noble".
Ó MAONAIGH     Irish
Irish Gaelic form of O'MOONEY.
Ó MARCAIGH     Irish
Irish Gaelic form of MARKEY.
Ó MATHGHAMHNA     Irish
Irish Gaelic form of MAHONEY.
OMDAHL     Norwegian
Denoted a person hailing from any one of a number of farms in Norway called either Åmdal or Omdal meaning "elm valley".
Ó MEADHRA     Irish
Means "descendant of Meadhra". The given name Meadhra is derived from the Gaelic meadhar meaning "merry, happy".
Ó MEARA     Irish
Variant of Ó MEADHRA.
Ó MOCHÁIN     Irish
Irish Gaelic form of MOHAN.
O'MOONEY     Irish
From the Irish Ó Maonaigh meaning "descendant of Maonaigh". The given name Maonaigh means "wealthy".
Ó MUIRCHEARTACH     Irish
Irish Gaelic form of MORIARTY.
Ó MURCHADHA     Irish
Irish Gaelic form of MURPHY.
O'NEAL     Irish
From Irish ó Néill meaning "descendant of NEIL".
O'NEILL     Irish
Variant of O'NEAL.
Ó NÉILL     Irish
Irish Gaelic form of O'NEAL.
ONGARO     Italian
Variant of UNGARO.
O'NIALL     Irish
Variant of O'NEAL.
Ó NUALLÁIN     Irish
Irish Gaelic form of NOLAN.
OOMEN     Dutch
Means "son of the uncle".
OORSCHOT     Dutch
Variant of VAN OORSCHOT.
OPEYEMI     Western African, Yoruba
From the given name OPEYEMI.
OPPENHEIMER     German
Originally indicated a person from Oppenheim, Germany.
OQUENDO     Spanish
Originally indicated a person from Okendo, Basque Country.
Ó RABHARTAIGH     Irish
Irish Gaelic form of RAFFERTY.
Ó RAGHAILLIGH     Irish
Means "descendant of Raghailligh", an Irish given name of unknown meaning.
ORBÁN     Hungarian
Derived from the given name ORBÁN.
O'REILLY     Irish
Anglicized form of Ó RAGHAILLIGH.
ORELLANA     Spanish
Derived from the place name Orellana which, in turn, is derived from Latin Aureliana "of Aurelius".
ORENSTEIN     Yiddish
Means "horn stone" in German.
Ó RÍAGÁIN     Irish
Irish Gaelic form of REAGAN.
Ó RIAIN     Irish
Means "descendant of RÍAN".
Ó RINN     Irish
Means "descendant of Rinn". The given name Rinn means "star" in Irish.
ORIOL     Catalan
Means "golden" in Catalan, originally a nickname for a person with blond hair.
ORLANDO     Italian
Derived from the given name ORLANDO.
ORLOV     Russian
Patronym derived from the Russian nickname Орёл (Oryol) meaning "eagle".
ORMAN     Irish
Anglicized form of Ó RUAIDH.
ORMOND     Irish
Anglicized form of Ó RUAIDH.
ORMONDE     Irish
Anglicized form of Ó RUAIDH.
Ó RODAGH     Irish
Means "descendant of Rodach" in Irish. The given name Rodach is derived from from Irish rod meaning "spirited, furious".
OROSZ     Hungarian
Means "Russian" in Hungarian.
ORSINI     Italian
From a nickname meaning "little bear" in Italian.
ORTEGA     Spanish
From a Spanish place name (belonging to various villages) meaning "nettle".
ORTIZ     Spanish
Means "son of Orti". The given name Orti seems to be disputed in meaning, deriving from either Latin fortis meaning "brave, strong" or Latin fortunius meaning "fortunate".
Ó RUADHÁIN     Irish
Means "descendant of RUADHÁN" in Irish.
Ó RUAIDH     Irish
Means "descendant of RUADH" in Irish.
OSBORNE     English
Derived from the given name OSBORN.
OSBOURNE     English
Derived from the given name OSBORN.
Ó SCOLAIDHE     Irish
Means "descendant of the scholar" from Irish scholaidhe.
Ó SÉAGHDHA     Irish
Means "descendant of SÉAGHDHA".
Ó SEANÁIN     Irish
Irish Gaelic form of SHANNON.
Ó SEIGHIN     Irish
Means "descendant of Seighin". The given name Seighin means "small hawk" from Old Irish séigene.
O'SHEA     Irish
Anglicized form of Ó SÉAGHDHA.
OSHIRO     Japanese
From Japanese (o) meaning "big, great" and (shiro) meaning "castle".
Ó SÍODA     Irish
Means "descendant of Síoda", a byname meaning "silk" in Irish.
Ó SIRIDEÁIN     Irish
Irish Gaelic form of SHERIDAN.
ÖSTBERG     Swedish, Jewish
Means "mountain (or hill) in the east" from Swedish öst "east" and berg "mountain, hill".
OSTBERG     Norwegian
From Østberg, the Norwegian form of ÖSTBERG.
ØSTER     Danish
Means "(dweller in the) eastern (side of a place)" from Danish øster meaning "eastern".
ØSTERGAARD     Danish
Variant of ØSTERGÅRD.
ØSTERGÅRD     Danish
Means "(dweller by or at the) eastern farm, enclosure" from Danish øster "eastern" and gård "enclosure, farm".
OSTROWSKI     Polish
From Polish ostrów meaning "river island".
Ó SUAIRD     Irish
Means "descendant of Suart" in Irish. Suart is derived from the Old Norse name SIGURD.
Ó SÚILEABHÁIN     Irish
Irish Gaelic form of SULLIVAN.
O'SULLIVAN     Irish
Variant of SULLIVAN.
Ó TADHGÁIN     Irish
Irish Gaelic form of TEAGAN.
Ó TAIDHG     Irish
Irish Gaelic form of TEAGUE (1).
Ó TÍGHEARNAIGH     Irish
Irish Gaelic form of TIERNEY.
OTIS     English
Means "son of ODE".
O'TOOLE     Irish
Anglicized form of Irish Ó Tuathail meaning "descendant of TUATHAL".
Ó TREASAIGH     Irish
Irish Gaelic form of TRACEY (2).
OTT     English, German
From the given name OTTO.
OTTEN     Dutch
Derived from the Dutch given name Ot, which is a nickname of Hadrianus (see ADRIAN) or ODO.
OTTO     German
From the German given name OTTO.
OTTOSEN     Danish, Norwegian
Means "son of OTTO".
OTTOSSON     Swedish
Means "son of OTTO".
Ó TUATHAIL     Irish
Irish Gaelic form of O'TOOLE.
OURSLER     German
Anglicized form of URSLER.
OUTLAW     English
Means simply "outlaw" from Middle English outlawe.
OUTTERRIDGE     English
Derived from the Old English given name Uhtric which was composed of the elements uht "dawn" and ric "power".
OVERTON     English
Denoted a person who hailed from one of the various places in England called Overton or Orton.
OVESEN     Norwegian
Means "son of OVE".
OWEN     Welsh
From the Welsh given name OWAIN.
OWENS     Welsh
From the Welsh given name OWAIN.
OWSTON     English
Denoted a person who came from any one of the places in Britain called Ouston or Owston.
OZOLIŅŠ     Latvian
Derived from ozols meaning "oak tree".
OZOLINSH     Latvian
Anglicized form of OZOLIŅŠ.
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