Surnames Starting with O

O'Berdick

Derived from an Irish personal name, with 'O'' indicating descent from an ancest...

O'Brian

O'Brien

Descendant of Brien, derived from the Gaelic 'Brien' meaning 'noble' or 'high.'

O'Byrne

Descendant of Byrne, derived from the Irish personal name Brion or Bran.

O'Connell

O'Conner

O'Connor

Descendant of Conchobhar, derived from 'conchobhar' meaning 'lover of hounds' or...

O'Conor

Descendant of Conor, derived from the Irish personal name Conchobhair meaning 'l...

O'Conroy

Descendant of Conroy, derived from Irish personal name elements.

O'Day

O'Dea

Descendant of Dea, derived from the Irish personal name Deaghaidh or similar ele...

O'Donnell

Descendant of Domhnall, derived from the Gaelic 'domh' (world) and 'nal' (mighty...

O'Duffy

O'Gorman

O'HAIR

O'Hara

O'Keefe

Descendant of Keefe, derived from the Irish personal name Caomh meaning 'gentle'...

O'Kelly

Descendant of Kelly, derived from the Irish personal name Ceallach meaning 'brig...

O'Leary

O'Mahoney

O'Malley

Descendant of Malley, derived from the Irish personal name Mael Maedoc or simila...

O'Neal

O'Neil

O'Neill

Descendant of Niall, derived from the Gaelic 'niall' meaning 'champion' or 'clou...

O'REILLEY

Descendant of Raghallach, meaning 'valiant' or 'fierce'.

O'Reilly

Descendant of Raghallach, derived from the Gaelic 'raghall' meaning 'foreigner' ...

O'Rielly

O'Ryan

O'SHANNESSEY

Descendant of Seannach, meaning 'old' or 'ancient'.

O'Shaughnessy

O'Sullivan

Descendant of Súilleabháin, derived from the Gaelic 'súil' (eye) and 'dubh' (...

O'Tool

Descendant of Tuathal, meaning 'people mighty' or 'strong people'.

O'Toole

OBNORSKY

Likely derived from a place name or personal characteristic, though the exact me...

OBREGON

OFFLEY

Dweller at a clearing or field belonging to Offa.

ORLOWSKI

Dweller from Orla or a place associated with eagles.

OSBORN

OTERO

Dweller on a hillside or elevated terrain.

OVERMAN

OVERMYER

Dweller over the mire or marsh.

Oakley

Obear

Likely a variant of 'O'Bear' or a descriptive surname related to bear-like quali...

Ober

Waiter or servant, derived from the occupational term for a waiter.

Obergh

Dweller on high ground or elevated terrain.

Oberlin

Obrecht

Bright or shining, derived from Germanic elements meaning 'ober' (upper) and 're...

Ochiltree

Ocho

Eight, derived from the Spanish numeral.

Ocker

Oddie

Odenheimer

Dweller from Odenheim, a place in Germany.

Oertel

Dweller in a small place or corner, derived from a diminutive form.

Ofstie

A surname of uncertain origin, possibly derived from a Norwegian place name or p...

Ogden

A person from Ogden, a place name meaning 'oak valley' in Old English.

Ogg

A surname possibly derived from a Scottish place name or a shortened form of a l...

Oglesby

A person from Oglesby, a place name in Lincolnshire, England.

Ohlson

The son of Ohl, a Scandinavian personal name.

Oka

A surname derived from Japanese characters meaning 'hill' or 'mound'.

Olaya

Olaya Herrera

A compound surname combining Olaya and Herrera, both Spanish surnames with separ...

Olcott

Oldfield

Oldperson

A descriptive surname referring to an elderly or aged person.

Olds

Oleson

The son of Ole, a Scandinavian personal name derived from Olaf.

Olim

A surname derived from Hebrew, possibly meaning 'ascenders' or related to immigr...

Olin

A surname derived from the Scandinavian personal name Olin or Ole.

Oliphant

Oliver

Oliver Fowlkes

A compound surname combining Oliver (from the personal name Oliver) and Fowlkes ...

Ollson

The son of Oll, a Scandinavian personal name.

Olmstead

Olmsted

A person from Olmsted, a place name in England meaning 'elm tree place'.

Olney

Olpp

A surname of uncertain origin, possibly derived from a German personal name or p...

Olson

Olsson

Son of Olof, a Scandinavian given name derived from Old Norse elements meaning '...

Omwake

Possibly derived from a place name or personal name, though the etymology is unc...

Only

Possibly derived from a place name or descriptive term, though the origin is unc...

Onou

The meaning is uncertain without clear etymological documentation.

Onsgard

Possibly derived from Old Norse elements relating to a place or dwelling, though...

Onsley

Possibly derived from an English place name or personal name, though the etymolo...

Opdyke

Derived from Dutch elements meaning 'up' and 'dike,' referring to someone living...

Oppegard

Derived from Old Norse elements meaning 'up' and 'enclosure' or 'dwelling,' refe...

Oppegaurd

Variant spelling of Oppegard, derived from Old Norse elements meaning 'up' and '...

Oppenheim

Derived from the German place name Oppenheim, a town in Rhineland-Palatinate, co...

Ordonez

Derived from the given name Ordoño, a medieval Spanish name, with the patronymi...

Ordway

Oreamuno

Orellano

Orlandine

Derived from the given name Orlando, an Italian form of Roland, with a diminutiv...

Orme

Oro

Derived from the Spanish and Italian word 'oro' meaning 'gold,' likely a descrip...

Orozco

Derived from a Basque place name, possibly related to 'oro' (gold) and 'zko' (a ...

Orr

Orth

Derived from the German word 'ort' meaning 'place' or 'location,' indicating a t...

Ortiz

Derived from the personal name Ortega or Ortiz, possibly meaning 'fortunate' or ...

Ortizo Rubio

A compound surname combining Ortizo (possibly from Ortiz) with Rubio, meaning 'r...

Osborne

Osgood

Oshima

Large island, derived from the Japanese characters for 'big' (大) and 'island' ...

Osmena

A surname of uncertain etymology, possibly related to Cebuano linguistic roots.

Osmer

A name possibly derived from Germanic elements meaning 'god' and 'famous' or 'br...

Ospina

A surname of uncertain origin, possibly topographic or derived from a personal n...

Osterhaus

Osterreth

A surname possibly meaning 'eastern clearing' or derived from a place name with ...

Osterrieth

A surname possibly meaning 'eastern clearing' or derived from a place name with ...

Ostmann

A surname meaning 'man from the east' or 'eastern man', derived from Germanic el...

Otto

Ouimet

A surname possibly derived from a French place name or personal name, with uncer...

Oulahan

A surname derived from the Irish personal name, possibly meaning 'descendant of ...

Oumansky

Oursler

A surname possibly meaning 'one who works with bears' or derived from a Germanic...

Ousley

A surname possibly derived from an English place name or personal name, with unc...

Overstreet

Overton

Ovey

A surname possibly derived from an English place name or personal name, with unc...

Owen

Son of Owen, derived from the Welsh name meaning 'young warrior' or 'well-born'.

Owens

Owsley

A surname possibly derived from an English place name or personal name, with unc...

Oxholm

Oxnard

A surname possibly meaning 'ox herder' or derived from an English place name.

Oxton

Settlement associated with a person named Occa or a place with oxen.

Oyster

Ozanic

Possibly derived from a Slavic root, though the exact meaning is unclear.

of Oregon