Unique Last Names That Start With O (With Meanings)

Do you love rare last names? Do you want ones that start with O? You have landed in the right place. This guide is full of O surnames. Some are old. Some are new. Some are rare. Some are common. Every one holds a story.

I once met a teacher named Mrs. Okafor. She told her class what her last name meant. It means “father is wealthy” in Igbo culture. The whole room got quiet. Everyone wanted to know their own name’s meaning after that. A single surname sparked real curiosity in a classroom full of kids.

Let’s get started.

Last Names That Start With O

These are some of the most interesting and rare O surnames from around the globe. They come from Irish, African, Japanese, and Slavic backgrounds, among others.

Last Name	Meaning	Origin
O’Brien	Descendant of Brian	Irish
Okafor	Father is wealthy	Igbo
Oliveira	Olive tree	Portuguese
Ortega	Nettle plant	Spanish
Okonkwo	Man of war	Igbo
Okoro	Kingdom	Igbo
Ozaki	Small cape	Japanese
Oduya	Wealth has come	Yoruba
Owens	Young warrior	Welsh
Osei	Noble and honorable	Akan
Obara	Great field	Japanese
Orlov	Eagle	Russian
Ostrowski	Sharp or pointed	Polish
Odinga	Strong and powerful	Luo
O’Leary	Descendant of the keeper	Irish
Ozturk	Pure Turk	Turkish
Ochoa	Wolf	Basque
Ogawa	Small river	Japanese
Obinna	Father is great	Igbo
Onyekachi	Who is greater than God	Igbo
Osborne	Divine bear warrior	English
Otieno	Born at night	Luo
Oates	Son of Ode	English
Oshiro	Large castle	Japanese
Olawale	Wealth has come home	Yoruba
Overbeck	Over the stream	German
Ostergaard	Eastern farm	Danish
Ogundele	God of iron has returned	Yoruba
Okubo	Large valley	Japanese
Ozoemena	May it not happen again	Igbo
Odell	From the valley	English
Oconnell	Descendant of Conall	Irish
Okerlund	From the field of oak	Swedish
Oyelaran	Honor walks with royalty	Yoruba
Ondricek	Little Andrew	Czech

Mexican Last Names That Start With O

Mexican last names mix strong Spanish roots with Indigenous history. These surnames tell stories of land, plants, and old family lines.

Last Name	Meaning	Origin
Ochoa	Wolf	Basque
Ortega	Nettle plant	Spanish
Orozco	Place of brambles	Spanish
Obregon	Bishop	Spanish
Ornelas	Place of ash trees	Spanish
Olivas	Olive tree	Spanish
Ontiveros	From the river bank	Spanish
Olvera	Olive grove	Spanish
Ovalle	From the valley	Spanish
Ojeda	From the oak grove	Spanish
Osorio	Bear keeper	Spanish
Ocampo	From the field	Spanish
Olea	Olive tree	Spanish
Olmedo	Elm tree grove	Spanish
Ordaz	Bold and strong	Spanish
Oviedo	From Oviedo city	Spanish
Olmos	Elm trees	Spanish
Oros	Gold	Spanish
Ozuna	From the bear clan	Spanish
Olguin	From the noble lineage	Spanish
Orendain	From the high land	Basque
Ocegueda	Place near the river	Spanish
Orrante	Wandering soul	Spanish
Ocaranza	Near the river stream	Spanish
Onate	From Onati town	Basque
Osuna	From Osuna city	Spanish
Olivares	Olive tree grove	Spanish
Oaxaca	Place of the gourds	Nahuatl
Ometochtzin	Two rabbits	Nahuatl
Oxitl	Resin or pitch	Nahuatl
Ozelotl	Jaguar	Nahuatl
Ollin	Movement	Nahuatl
Ozomatli	Monkey	Nahuatl
Otomi	People of the land	Indigenous
Ocotepec	Place of pine trees	Nahuatl

Hispanic Family Last Names That Start With O

Hispanic surnames span Spain and all of Latin America. These names carry strong ties to land, faith, and family lines.

Last Name	Meaning	Origin
Ochoa	Wolf	Hispanic
Ortega	Nettle plant	Hispanic
Orozco	Place of brambles	Hispanic
Obregon	Bishop	Hispanic
Ornelas	Place of ash trees	Hispanic
Olivas	Olive tree	Hispanic
Ontiveros	From the river bank	Hispanic
Olvera	Olive grove	Hispanic
Ovalle	From the valley	Hispanic
Ojeda	From the oak grove	Hispanic
Osorio	Bear keeper	Hispanic
Ocampo	From the field	Hispanic
Olea	Olive tree	Hispanic
Olmedo	Elm tree grove	Hispanic
Ordaz	Bold and strong	Hispanic
Oviedo	From Oviedo city	Hispanic
Olmos	Elm trees	Hispanic
Oros	Gold	Hispanic
Ozuna	From the bear clan	Hispanic
Olguin	From the noble lineage	Hispanic
Ordonez	Son of Ordono	Hispanic
Otero	High ground or hill	Hispanic
Obaldia	From the noble valley	Hispanic
Oyarzun	Place of many oaks	Hispanic
Osegueda	From the river place	Hispanic
Orduna	From Orduña town	Hispanic
Olachea	From the high hill	Hispanic
Orue	From the well place	Hispanic
Oyanguren	From the deep valley	Hispanic
Olcina	From Olcina town	Hispanic
Ontanon	From the water spring	Hispanic
Osegura	Sure and safe place	Hispanic
Olascoaga	Place of the ravine	Hispanic
Otazu	From Otazu land	Hispanic
Orbea	From Orbea town	Hispanic

African Last Names That Start With O

African surnames carry strong spiritual and ancestral meaning. Many describe faith, birth order, or a hope for the future.

Last Name	Meaning	Origin
Okafor	Father is wealthy	Igbo
Okonkwo	Man of war	Igbo
Okoro	Kingdom	Igbo
Obinna	Father is great	Igbo
Onyekachi	Who is greater than God	Igbo
Oduya	Wealth has come	Yoruba
Osei	Noble and honorable	Akan
Odinga	Strong and powerful	Luo
Otieno	Born at night	Luo
Ogundele	God of iron has returned	Yoruba
Olawale	Wealth has come home	Yoruba
Owusu	Strong and powerful	Akan
Oyelaran	Honor walks with royalty	Yoruba
Onyema	Good life	Igbo
Obasi	In honor of God	Igbo
Okeke	Born on market day	Igbo
Osagie	God agrees	Edo
Omondi	Born in the morning	Luo
Ouedraogo	Fierce bull	Mossi
Odhiambo	Born in the evening	Luo
Onyango	Born during harvest	Luo
Okwu	Voice or speech	Igbo
Oluwaseun	God has done this	Yoruba
Ofoegbu	Wealth does not fight	Igbo
Onyeaka	Who knows what is good	Igbo
Opoku	Royal and noble	Akan
Osei-Bonsu	Noble elephant	Akan
Otabil	Strong foundation	Akan
Onyekwere	Who knows the future	Igbo
Ozigbo	Great wealth	Igbo
Oyelami	Honor makes gentle	Yoruba
Ogbonna	Father’s image	Igbo
Ojo	Born after twins	Yoruba
Osaretin	God is enough	Edo
Obiora	People’s will	Igbo

English Last Names That Start With O

English surnames starting with O often trace back to medieval times. Many describe land, trees, or an old job passed through generations.

Last Name	Meaning	Origin
Owen	Young warrior	Old Welsh
Osborne	Divine bear warrior	Old English
Oates	Son of Ode	Old English
Oldham	Old village	Old English
Orton	Settlement on the shore	Old English
Oakley	Oak wood clearing	Old English
Oswald	Divine power	Old English
Odell	From the valley	Old English
Osmond	Divine protector	Old English
Oxley	Ox meadow	Old English
Outlaw	One outside the law	Old English
Overhill	Lives over the hill	Old English
Orchard	Tends an orchard	Old English
Orme	Serpent or dragon	Old Norse
Ogden	From the oak valley	Old English
Oldfield	From the old field	Old English
Orrell	From the ore hill	Old English
Osgood	Divine goodness	Old English
Ottley	From Otta’s meadow	Old English
Oxenham	Ox enclosure home	Old English
Ormerod	Orm’s clearing	Old English
Onslow	One’s hill or mound	Old English
Openshaw	Open woodland area	Old English
Osbaldeston	Osbald’s settlement	Old English
Otterburn	Otter stream	Old English
Overbury	Upper fortified place	Old English
Oswaldtwistle	Oswald’s river fork	Old English
Outram	Wealthy raven	Old English
Olliver	Olive tree descendant	Old English
Ockenden	From the oak valley	Old English
Oxendine	Ox meadow dweller	Old English
Otway	Rich in war	Old English
Overend	At the end of the village	Old English
Oldacre	Old field or plot	Old English
Onions	Descendant of Enion	Welsh

Japanese Last Names That Start With O

Japanese surnames often connect to rivers, valleys, and small towns. Each name usually paints a small picture of the land itself.

Last Name	Meaning	Origin
Ozaki	Small cape	Japanese
Obara	Great field	Japanese
Ogawa	Small river	Japanese
Oshiro	Large castle	Japanese
Okubo	Large valley	Japanese
Oda	Small rice field	Japanese
Ogata	Small shape or form	Japanese
Ohashi	Large bridge	Japanese
Oishi	Large stone	Japanese
Okada	Hill rice field	Japanese
Okamoto	Base of the hill	Japanese
Okamura	Hill village	Japanese
Okazaki	Hill point cape	Japanese
Okino	Field near the shore	Japanese
Omori	Large forest	Japanese
Onishi	Large west	Japanese
Ono	Small field	Japanese
Onodera	Small temple field	Japanese
Osawa	Large swamp	Japanese
Oshima	Large island	Japanese
Otani	Large valley	Japanese
Otsuka	Small hill	Japanese
Owada	Large rice field	Japanese
Oyama	Large mountain	Japanese
Ozawa	Small swamp	Japanese
Okumura	Deep inner village	Japanese
Okuyama	Deep mountain	Japanese
Oyabu	Great warrior grove	Japanese
Ozeki	Great barrier	Japanese
Obuchi	Great pond	Japanese
Oikawa	Chasing river	Japanese
Okumoto	Base of the interior	Japanese
Ozu	Small harbor	Japanese
Omura	Great village	Japanese
Oura	Great bay	Japanese

Irish Surnames Starting With O

Irish surnames starting with O are some of the oldest family names in Europe. Many carry the “O'” prefix, meaning “descendant of.”

Last Name	Meaning	Origin
O’Brien	Descendant of Brian	Irish
O’Leary	Descendant of the keeper	Irish
O’Connell	Descendant of Conall	Irish
O’Connor	Descendant of Conchobhar	Irish
O’Neill	Descendant of Niall	Irish
O’Sullivan	Descendant of the hawk eyed	Irish
O’Reilly	Descendant of Raghallach	Irish
O’Donnell	Descendant of Domhnall	Irish
O’Malley	Descendant of Malley	Irish
O’Dwyer	Descendant of the dark one	Irish
O’Grady	Descendant of the noble	Irish
O’Rourke	Descendant of Ruarc	Irish
O’Doherty	Descendant of Dochartach	Irish
O’Callaghan	Descendant of the strife lover	Irish
O’Farrell	Descendant of the brave man	Irish
O’Hara	Descendant of Eaghra	Irish
O’Keeffe	Descendant of the gentle one	Irish
O’Shea	Descendant of the fairy king	Irish
O’Toole	Descendant of the ruler	Irish
O’Byrne	Descendant of Bran	Irish
O’Boyle	Descendant of the pledge	Irish
O’Carroll	Descendant of the champion	Irish
O’Casey	Descendant of the watchful	Irish
O’Daly	Descendant of the gatherer	Irish
O’Flynn	Descendant of the red haired	Irish
O’Hagan	Descendant of the young one	Irish
O’Hanlon	Descendant of the champion	Irish
O’Kane	Descendant of Cathan	Irish
O’Loughlin	Descendant of the lake	Irish
O’Mahony	Descendant of Mahon	Irish
O’Meara	Descendant of the jovial	Irish
O’Regan	Descendant of the impulsive	Irish
O’Rian	Descendant of the little king	Irish
O’Shaughnessy	Descendant of the elfin one	Irish
O’Sheehan	Descendant of the peaceful	Irish

Famous People With Last Names Starting With O

Many well-known figures carry a bold O last name. From politics to sports to music, these surnames have made history in every field.

Last Name	Famous Person	Field
Obama	Barack Obama	Politics
Winfrey	Oprah Winfrey	Entertainment
Owens	Jesse Owens	Sports
Osbourne	Ozzy Osbourne	Music
Olivier	Laurence Olivier	Acting
Orwell	George Orwell	Literature
O’Neal	Shaquille O’Neal	Sports
O’Brien	Conan O’Brien	Entertainment
Ocasio-Cortez	Alexandria Ocasio-Cortez	Politics
Okafor	Emeka Okafor	Sports
Ozil	Mesut Ozil	Sports
Okonjo-Iweala	Ngozi Okonjo-Iweala	Economics
Ohm	Georg Simon Ohm	Science
Okri	Ben Okri	Literature
Oduya	Johnny Oduya	Sports
Offenbach	Jacques Offenbach	Music
Ono	Yoko Ono	Music
Ochoa	Lorena Ochoa	Sports
Orozco	Jose Clemente Orozco	Art
Ortega	Daniel Ortega	Politics
O’Keeffe	Georgia O’Keeffe	Art
Ozawa	Seiji Ozawa	Music
Obasanjo	Olusegun Obasanjo	Politics
Oldman	Gary Oldman	Acting
O’Connor	Sinead O’Connor	Music
Oates	Joyce Carol Oates	Literature
Ostwald	Wilhelm Ostwald	Science
Ogata	Sadako Ogata	Humanitarian
Ovechkin	Alexander Ovechkin	Sports
Obradovic	Zeljko Obradovic	Sports
Osment	Haley Joel Osment	Acting
Overstreet	Chad Overstreet	Music
O’Donoghue	Michael O’Donoghue	Comedy
Okoye	Ifeoma Okoye	Literature
Otero	Sandra Otero	Journalism

Final Thoughts

Last names that start with O stretch across every continent. Some mean strength, like Okonkwo. Some mean land, like Oakley. Some mean hope, like Olawale.

No matter why you searched today, we hope this list gave you plenty of options. Save your favorites. Say them aloud. Look deeper into their roots. A great O last name could be the start of something meaningful.

Frequently Asked Questions

What are the most common last names that start with O?

Owen, Ortega, Ochoa, Osborne, and O’Brien rank among the most common O surnames.

What culture has the most last names starting with O?

African and Spanish cultures both have a very large number of O surnames.

Are O last names rare?

Some are common. Many others are rare, especially African and Indigenous O surnames.

What is the most famous last name starting with O?

Obama is widely seen as the most famous O surname in the modern world.

Do O last names have deep meanings?

Yes. Most carry meanings tied to nature, strength, wealth, or family roots passed down for generations.

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