Many last names that start with the letter O have an air of optimism and positivity. When spoken, the letter O gives a very open, inviting sound. Below, we list some of the most common last names that begin with O.
Why Choose a Last Name Beginning with O?
The letter O has a deep, booming tone. Many last names in the United States start with O’ (O followed by an apostrophe). The suffix of O’ originates in the Irish and Gaelic languages and means ‘grandson/descendant of.’ So, for example, the last name O’Connor means ‘grandson or descendant of Connor.’ Other surnames starting with O in the US include names with Scandinavian origins, such as Olson, and names with Hispanic roots, such as Ortiz. Popular last names in the US, starting with O, include Owens, Ortega, Oliver, Ochoa, and Osborne. Unique last names beginning with O include Oakes, Oakley, Olivier, Onyx, and Orleans.
Many exciting surnames start with O if you need help finding a creative last name for your family or fictional character.
Last Names Starting with O
Uncover the top surnames starting with O with this complete list below. Here you will find a list of surnames that begin with OA, sorted by popularity, from most to least popular.
- Ortiz
- Owens
- Olson
- Ortega
- Oliver
- Ochoa
- Osborne
- Orozco
- Owen
- Olsen
- Oneill
- Oneal
- Orr
- Odom
- Osborn
- Odell
- Osorio
- Oneil
- Olvera
- Orellana
- Ott
- Ocampo
- Olivares
- Ornelas
- Otto
- Oleary
- Ojeda
- Otero
- Olivas
- Oliva
- Oliveira
- Ogden
- Overton
- Ordonez
- Oh
- Omalley
- Oakes
- Oakley
- Orourke
- Ontiveros
- Ogle
- Oswald
- Ouellette
- Oldham
- Orlando
- Overstreet
- Oglesby
- Oates
- Oreilly
- Otoole
- Olguin
- Oshea
- Olivo
- Osman
- Olmos
- Olivarez
- Ong
- Ostrander
- Ocasio
- Olivera
- Outlaw
- Orosco
- Oden
- Oviedo
- Olmstead
- Orta
- Ordaz
- Ovalle
- Olds
- Omar
- Osuna
- Osburn
- Otis
- Ogrady
- Oaks
- Oxendine
- Oropeza
- Oakry
- O’Bear
- O’Brien
- O’Connor
- Oestreich
- Oghagbon
- Ogier
- Okeke
- Okwilagwe
- Olaeta
- Olagbaju
- Olczak
- Oloyede
- Olverson
- Omdahl
- Omozee
- O’Neal
- O’Neill
- Onwuka
- Onyenwere
- Oramas
- Orji
- Orth
- Outlow
- Outten
- Overbeck
- O’Brien
- O’Connor
- O’Neill
- O’Sullivan
- O’Boyle
- O’Cahan
- O’Callaghan
- O’Casey
- O’Clery
- O’Connell
- Octavius
- O’Day
- O’Dea
- O’Dell
- O’Donovan
- O’Driscoll
- O’Farrell
- O’Friel
- Ogilvie
- Ogilvy
- O’Hagan
- O’Halloran
- O’Hara
- O’Hare
- O’Hea
- O’Higgins
- O’Keefe
- Olivier
- Ollivier
- O’Loughlin
- Olympia
- O’Lynn
- O’Reilly
- O’Riordan
- O’Shaughnessy
- O’Sheehan
- O’Sullivan
- O’Toole
- O’Donnell
- Ozzy
See 5,000 Most Common Last Names
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