Surnames Starting with O

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OAKLEYEnglish
From a place name meaning "oak clearing" in Old English. It was borne by American sharpshooter Annie Oakley (1860-1926).
OBAMAEastern 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.
OBANDOSpanish
Habitational name for someone who lived in Obando in Extremadura, Spain.
Ó BAOGHILLIrish
Irish Gaelic form of BOYLE.
OBERSTGerman
Means "from the uppermost end of a village, top of a house" from Middle High German ober, obar.
OBERTIItalian
Derived from the given name UBERTO.
OBERTOItalian
Derived from the given name UBERTO.
O'BOYLEIrish
Variant of BOYLE.
Ó BRÁDAIGHIrish
Irish Gaelic form of BRADY.
Ó BRADÁINIrish
Irish Gaelic form of BRADEN.
Ó BRAOINIrish
Irish Gaelic form of BREEN.
Ó BRAONÁINIrish
Irish Gaelic form of BRENNAN.
Ó BRIAINIrish
Irish Gaelic form of O'BRIEN.
O'BRIENIrish
From the Irish Ó Briain meaning "descendant of BRIAN".
Ó BROINIrish
Irish Gaelic form of O'BYRNE.
Ó BUACHALLAIrish
Irish Gaelic form of BUCKLEY (2).
O'BYRNEIrish
Anglicized form of Irish Ó Broin meaning "descendant of BRAN (1)".
Ó CAISIDEIrish
Irish Gaelic form of CASSIDY.
Ó CAOIMHIrish
Irish Gaelic form of KEEFE.
Ó CAOIMHÁINIrish
Irish Gaelic form of CAVAN.
Ó CAOINDEALBHÁINIrish
Irish Gaelic form of QUINLAN.
Ó CATHÁINIrish
Means "descendant of CATHÁN".
Ó CATHASAIGHIrish
Irish Gaelic form of CASEY.
Ó CEALLACHÁINIrish
Irish Gaelic form of CALLAGHAN.
Ó CEALLAIGHIrish
Irish Gaelic form of KELLY (1).
Ó CEARMADAIrish
Irish Gaelic form of CARMODY.
Ó CEITHEARNAIGHIrish
Irish Gaelic form of KEARNEY.
OCHOABasque, Spanish
From a Basque nickname meaning "wolf".
Ó CIARDHAIrish
Irish Gaelic form of CAREY.
Ó CINNÉIDIGHIrish
Irish Gaelic form of KENNEDY.
Ó CLÉIRIGHIrish
Means "descendant of the clerk" in Irish.
O'CLERYIrish
Anglicized form of Ó CLÉIRIGH.
Ó CNÁIMHÍNIrish
Means "descendant of Cnámh", Cnámh being a nickname meaning "bone".
Ó COCHLÁINIrish
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 COIGLIGHIrish
Irish Gaelic form of QUIGLEY.
Ó COILEÁINIrish
Means "descendant of COILEAN" in Irish.
Ó CONAILLIrish
Irish Gaelic form of CONNELL.
Ó CONCHOBHAIRIrish
Irish Gaelic form of O'CONNOR.
Ó CONGHALAIGHIrish
Irish Gaelic form of CONNOLLY.
O'CONNORIrish
From Irish Ó Conchobhair meaning "descendant of CONCHOBHAR".
Ó CORCRÁINIrish
Irish Gaelic form of CORCORAN.
Ó CORRAIDHÍNIrish
Irish Gaelic form of CURRAN.
Ó CUANAIrish
Irish Gaelic form of COONEY.
Ó CUIDIGHTHIGHIrish
Irish Gaelic form of CODY.
Ó CUILINNIrish
Means "descendant of Cuileann", Cuileann being a nickname meaning "holly".
Ó CUINNIrish
Irish Gaelic form of QUINN.
Ó DÁLAIGHIrish
Irish Gaelic form of DALY.
Ó DAMHÁINIrish
Means "descendant of DAMHÁN".
ODELLEnglish
Originally denoted a person who was from Odell (Bedfordshire), England.
Ó DEORÁINIrish
Irish Gaelic form of DORAN.
Ó DÍOMASAIGHIrish
Irish Gaelic form of DEMPSEY.
Ó DOCHARTAIGHIrish
Irish Gaelic form of DOHERTY.
Ó DOIBHILINIrish
Irish Gaelic form of DEVLIN.
Ó DOIRNÁINIrish
Irish Gaelic form of DURNIN.
Ó DOMHNAILLIrish
Irish Gaelic form of O'DONNELL.
Ó DONNCHADHAIrish
Irish Gaelic form of DONOGHUE.
Ó DONNDUBHÁINIrish
Irish Gaelic form of DONOVAN.
O'DONNELLIrish
Anglicized form of Irish Ó Domhnaill meaning "descendant of DOMHNALL".
Ó DONNGHAILEIrish
Irish Gaelic form of DONNELLY.
O'DOYLEIrish
Variant of DOYLE.
Ó DUBHÁINIrish
Means "descendant of DUBHÁN".
Ó DUBHGHAILLIrish
Irish Gaelic form of DOYLE.
Ó DUBHSHLÁINIrish
Irish Gaelic form of DOLAN.
Ó DUBHTHAIGHIrish
Irish Gaelic form of DUFFY (1).
OELBERGGerman
Means "oil hill" from the Germanic oel "oil" and berg "hill".
Ó FAOLÁINIrish
Irish Gaelic form of WHELAN.
Ó FEARGHAILIrish
Irish Gaelic form of FARRELL.
OFFERMANSDutch
From the Dutch occupation offerman, the man who collects ofer "money", in a church.
Ó FIONNAGÁINIrish
Irish Gaelic form of FINNEGAN.
Ó FIONNÁINIrish
Irish Gaelic form of FANNON.
Ó FLANNAGÁINIrish
Irish Gaelic form of FLANAGAN.
Ó FLOINNIrish
Irish Gaelic form of FLYNN.
Ó FOGHLADHAIrish
Irish Gaelic form of FOLEY.
Ó FRIGHILIrish
Irish Gaelic form of FRIEL.
Ó GALLCHOBHAIRIrish
Irish Gaelic form of GALLAGHER.
OGDENEnglish
Means "(dweller in the) oak valley" from Old English âc "oak" and denu "valley".
OGNIANOVBulgarian
Variant transcription of OGNYANOV.
OGNYANOVBulgarian
Means "son of OGNYAN".
Ó GORMÁINIrish
Irish Gaelic form of GORMAN (2).
OGTROPDutch
Originally denoted a person who was from the town of Ochtrup in Germany, which is of uncertain origin.
Ó HALLMHURÁINIrish
Irish Gaelic form of HALLORAN.
O'HANNAGAINIrish
From Irish Ó hAnnagáin, which means "descendant of Annagán". The given name Annagán was a diminutive of Annadh meaning "delay".
Ó HANNAGÁINIrish
Irish Gaelic form of O'HANNAGAIN.
Ó HAODHAIrish
Irish Gaelic form of HAYES (2).
Ó HAONGHUISIrish
Irish Gaelic form of HENNESSY.
O'HARAIrish
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 HEACHTHIGHEARNAIrish
Means "descendant of Eichthighearn", where the personal name Eichthighearn means "horse lord" in Gaelic.
Ó HEAGHRAIrish
Irish Gaelic form of O'HARA.
O'HEARNIrish
Anglicized form of Ó HEACHTHIGHEARNA.
Ó HÉIDEÁINIrish
Means "descendant of Éideán" in Irish. The given name Éideán is a diminutive of éideadh meaning "clothes, armour".
Ó HEIDHINIrish
Irish Gaelic form of HINES.
Ó HÉIDÍNIrish
Means "descendant of Éidín" in Irish. The given name Éidín is a diminutive of éideadh meaning "clothes, armour".
Ó HEIDIRSCEÓILIrish
Irish Gaelic form of DRISCOLL.
Ó HÍCIDHEIrish
Irish Gaelic form of HICKEY.
Ó HIFEARNÁINIrish
Irish Gaelic form of HEFFERNAN.
OHMEGerman
Means "uncle".
Ó HÓGÁINIrish
Irish Gaelic form of HOGAN.
Ó HUIGINNIrish
Irish Gaelic form of HIGGINS.
OJEDASpanish
Originally a name for a dweller on the banks of the Ojeda river.
OKAFORWestern African, Igbo
From the given name OKAFOR.
O'KANEIrish
Anglicized form of Ó CATHÁIN.
O'KEEFEIrish
Variant of KEEFE.
OKEKEWestern African, Igbo
From the given name OKEKE.
OKONKWOWestern African, Igbo
From the given name OKONKWO.
OKORIEWestern African, Igbo
From the given name OKORIE.
OLASpanish, Basque
Means "forge" or "shepherd's cabin" from the Basque ola.
OLÁHHungarian
Derived from Hungarian volách meaning "Romanian".
OLANDERSwedish
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 LAOGHAIREIrish
Irish Gaelic form of O'LEARY.
OLASZHungarian
Means "Italian" in Hungarian.
Ó LEANNÁINIrish
Irish Gaelic form of LENNON.
O'LEARYIrish
From Irish Ó Laoghaire meaning "descendant of LAOGHAIRE".
OLEASTROSpanish
Means "(dweller by the) wild olive tree".
OLESENDanish
Means "son of OLE".
OLHOUSERNorwegian, English
Means "(dweller by or near the) old house".
OLIVERCatalan, English, French, German, Scottish
Derived from the given name OLIVER.
OLIVERSENNorwegian
Norwegian form of OLIVERSON.
OLIVERSONEnglish
Means "son of OLIVER".
OLIVIERFrench
Derived from the given name OLIVIER.
OLMOSpanish
Means "elm tree" in Spanish, ultimately from Latin ulmus. The name originally indicated a person who lived near such a tree.
OLMOSSpanish
Variant of OLMO.
OLOFSDOTTERSwedish
Means "daughter of OLOF".
OLOFSSONSwedish
Means "son of OLOF".
Ó LOINGSIGHIrish
Irish Gaelic form of LYNCH.
OLSENDanish
Means "son of OLE".
OLSONSwedish, Danish
Anglicized form of OLSSON or OLSEN.
OLSSONSwedish
Means "son of OLAF".
Ó LUAINIrish
Irish Gaelic form of LANE (3).
OLVIRSSONIcelandic
Means "son of Óleifr", Óleifr is the ancient form of OLAF.
Ó MADAIDHÍNIrish
Means "descendant of Madaihín", a given name derived from Irish madadh meaning "dog, mastiff".
Ó MÁILLEIrish
Means "descendant of a nobleman" from the Irish Gaelic mál.
O'MALLEYIrish
Anglicized form of Ó MÁILLE.
ÖMANSwedish
From the Swedish words ö meaning "island" and man meaning "man". Thus the meaning is "man from the island".
Ó MANACHÁINIrish
Irish Gaelic form of MONAHAN.
Ó MAOIL EOINIrish
Irish Gaelic form of MALONE.
Ó MAOIL RIAINIrish
Means "descendant of a follower of RÍAN", derived from Irish maol meaning "follower".
Ó MAOILSHEACHLAINNIrish
Means "descendant of MAOLSHEACHLANN" in Irish.
Ó MAOLÁINIrish
Irish Gaelic form of MULLEN.
Ó MAOL AODHAIrish
Means "descendant of a follower of Saint AODH". It is derived from Irish maol meaning "follower, servant".
Ó MAOL DHOMHNAIGHIrish
Irish Gaelic form of MOLONEY.
Ó MAOLMHUAIDHIrish
Means "descendant of Maolmhuadh", Maolmhuadh being a given name meaning "proud chief", derived from Gaelic maol meaning "chief" and muadh meaning "proud, noble".
Ó MAONAIGHIrish
Irish Gaelic form of O'MOONEY.
Ó MARCAIGHIrish
Irish Gaelic form of MARKEY.
Ó MATHGHAMHNAIrish
Irish Gaelic form of MAHONEY.
OMDAHLNorwegian
Denoted a person hailing from any one of a number of farms in Norway called either Åmdal or Omdal meaning "elm valley".
Ó MEADHRAIrish
Means "descendant of Meadhra". The given name Meadhra is derived from the Gaelic meadhar meaning "merry, happy".
Ó MOCHÁINIrish
Irish Gaelic form of MOHAN.
O'MOONEYIrish
From the Irish Ó Maonaigh meaning "descendant of Maonaigh". The given name Maonaigh means "wealthy".
Ó MUIRCHEARTACHIrish
Irish Gaelic form of MORIARTY.
Ó MUIREADHAIGHIrish
Irish Gaelic form of MURRAY (2).
Ó MURCHADHAIrish
Irish Gaelic form of MURPHY.
O'NEALIrish
From Irish ó Néill meaning "descendant of NEIL".
O'NEILLIrish
Variant of O'NEAL.
Ó NÉILLIrish
Irish Gaelic form of O'NEAL.
O'NIALLIrish
Variant of O'NEAL.
Ó NUALLÁINIrish
Irish Gaelic form of NOLAN.
OOMENDutch
Means "son of the uncle".
OPPENHEIMERGerman
Originally indicated a person from Oppenheim, Germany.
OQUENDOSpanish
Originally indicated a person from Okendo, Basque Country.
Ó RABHARTAIGHIrish
Irish Gaelic form of RAFFERTY.
Ó RAGHAILLIGHIrish
Means "descendant of Raghailligh", an Irish given name of unknown meaning.
ORBÁNHungarian
Derived from the given name ORBÁN.
O'REILLYIrish
Anglicized form of Ó RAGHAILLIGH.
ORELLANASpanish
Derived from the place name Orellana which, in turn, is derived from Latin Aureliana "of Aurelius".
ORENSTEINYiddish
Means "horn stone" in German.
Ó RÍAGÁINIrish
Irish Gaelic form of REAGAN.
Ó RIAINIrish
Means "descendant of RÍAN".
Ó RINNIrish
Means "descendant of Rinn". The given name Rinn means "star" in Irish.
ORIOLCatalan
Means "golden" in Catalan, originally a nickname for a person with blond hair.
ORLANDOItalian
Derived from the given name ORLANDO.
ORLOVRussian
Patronym derived from the Russian nickname Орёл (Oryol) meaning "eagle".
ORMANIrish
Anglicized form of Ó RUAIDH.
ORMONDIrish
Anglicized form of Ó RUAIDH.
ORMONDEIrish
Anglicized form of Ó RUAIDH.
Ó RODAGHIrish
Means "descendant of Rodach" in Irish. The given name Rodach is derived from from Irish rod meaning "spirited, furious".
OROSZHungarian
Means "Russian" in Hungarian.
ORSINIItalian
From a nickname meaning "little bear" in Italian.
ORTEGASpanish
From a Spanish place name (belonging to various villages) meaning "nettle".
ORTIZSpanish
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 RUADHÁINIrish
Means "descendant of RUADHÁN" in Irish.
Ó RUAIDHIrish
Means "descendant of RUADH" in Irish.
OSBORNEEnglish
Derived from the given name OSBORN.
OSBOURNEEnglish
Derived from the given name OSBORN.
Ó SCOLAIDHEIrish
Means "descendant of the scholar" from Irish scholaidhe.
Ó SÉAGHDHAIrish
Means "descendant of SÉAGHDHA".
Ó SEANÁINIrish
Irish Gaelic form of SHANNON.
Ó SEIGHINIrish
Means "descendant of Seighin". The given name Seighin means "small hawk" from Old Irish séigene.
O'SHEAIrish
Anglicized form of Ó SÉAGHDHA.
OSHIROJapanese
From Japanese (o) meaning "big, great" and (shiro) meaning "castle".
Ó SÍODAIrish
Means "descendant of Síoda", a byname meaning "silk" in Irish.
Ó SIRIDEÁINIrish
Irish Gaelic form of SHERIDAN.
ÖSTBERGSwedish
Means "mountain (or hill) in the east" from Swedish öst "east" and berg "mountain, hill".
OSTBERGNorwegian
From Østberg, the Norwegian form of ÖSTBERG.
ØSTERDanish
Means "(dweller in the) eastern (side of a place)" from Danish øster meaning "eastern".
ØSTERGÅRDDanish
Means "(dweller by or at the) eastern farm, enclosure" from Danish øster "eastern" and gård "enclosure, farm".
OSTROWSKIPolish
From Polish ostrów meaning "river island".
Ó SUAIRDIrish
Means "descendant of Suart" in Irish. Suart is derived from the Old Norse name SIGURD.
Ó SÚILEABHÁINIrish
Irish Gaelic form of SULLIVAN.
Ó TADHGÁINIrish
Irish Gaelic form of TEAGAN.
Ó TAIDHGIrish
Irish Gaelic form of TEAGUE (1).
OTIENOEastern African, Luo
Derived from the given name OTIENO.
Ó TÍGHEARNAIGHIrish
Irish Gaelic form of TIERNEY.
OTISEnglish
Means "son of ODE".
O'TOOLEIrish
Anglicized form of Irish Ó Tuathail meaning "descendant of TUATHAL".
Ó TREASAIGHIrish
Irish Gaelic form of TRACEY (2).
OTTEnglish, German
From the given name OTTO.
OTTENDutch
Derived from the Dutch given name Ot, which is a nickname of Hadrianus (see ADRIAN) or ODO.
OTTOGerman
From the German given name OTTO.
OTTOSENDanish, Norwegian
Means "son of OTTO".
OTTOSSONSwedish
Means "son of OTTO".
Ó TUATHAILIrish
Irish Gaelic form of O'TOOLE.
OURSLERGerman
Originally a name designating a person from Ursel, Germany.
OUTLAWEnglish
Means simply "outlaw" from Middle English outlawe.
OUTTERRIDGEEnglish
Derived from the Old English given name Uhtric which was composed of the elements uht "dawn" and ric "power".
OVERTONEnglish
Denoted a person who hailed from one of the various places in England called Overton or Orton.
OVESENNorwegian
Means "son of OVE".
OWENWelsh
From the Welsh given name OWAIN.
OWENSWelsh
From the Welsh given name OWAIN.
OWSTONEnglish
Denoted a person who came from any one of the places in Britain called Ouston or Owston.
OZOLIŅŠLatvian
From Latvian ozols meaning "oak tree".
OZOLINSHLatvian
Anglicized form of OZOLIŅŠ.
OZOLSLatvian
Means "oak tree" in Latvian.
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