Names starting with O.
- Oaklan English · Land of oaks, symbolizing strength and endurance
- Oakleigh English · Oak clearing, oak meadow
- Oakley English · Oak Clearing
- Oaklynn American modern invented · Oak tree pool
- Oana Romanian/Hebrew · God is gracious
- Oba Yoruba oba · King or ruler
- Oban Scottish/Gaelic · Little bay or small harbor
- Obasi Igbo · Aba-related
- Obdulia Latin Obdullius · Stubborn or hardened
- Obe Germanic (Dutch) · Wealthy guardian
- Obi Igbo obi · Chief
- Obiageli Igbo · Obi's daughter
- Obiajulu Igbo obi-ajulu · Chief's judgment or leadership virtue
- Obinna Igbo · Father's heart
- Obio Igbo obi-o · Chief's daughter
- Obiora Igbo obi-ora · Chief lives long
- Obrad Slavic · From Serbian obradovati, meaning to make happy
- Obure Luhya obure · Born by the river
- Ocean Greek · Vast body of saltwater; from Greek ōkeanos, meaning great stream encircling the earth's disc
- Océane French-Greek · Ocean
- Oche Igbo oche · At home
- Ochieng Luo ochieng · Born at night
- Octave French · Eighth born
- Octavia Latin · Eighth; from Latin octavus
- Octavian Latin · Eighth
- Octavie Latin · Eighth
- Octavius Latin Octavius · eighth
- Octawian Latin Octavianus · Eighth
- Oda Germanic Oda · Wealthy or prosperous
- Odair Brazilian Portuguese · Brazilian name, meaning unclear
- Odartey Ga odartey · stone
- Odd Old Norse Oddr · Point of a weapon
- Oddlaug Old Norse Oddlaug · Sacred point
- Oddny Old Norse Oddný · Point
- Oddvar Old Norse Oddvarr · Point and defender
- Odélia Hebrew/Germanic · Hebrew for I will praise God or God is my praise
- Odessa Greek/Russian · Long journey or wandering
- Odete Germanic-Portuguese · Wealth or fortune
- Odett Hungarian/French · wealth
- Odetta Yoruba · Wealthy
- Odette Germanic Oda · Wealthy or prosperous one
- Odhiambo Luo odhiambo · Born in the morning
- Odhran Irish/Gaelic · Dun-colored, little pale green one
- Odile Germanic Oda · Wealthy or prosperous
- Odilia Germanic Oda · Wealthy or prosperous
- Odilon Germanic/Latin · Wealth
- Odin Old Norse Oðinn · Fury, inspiration
- Odinaka Igbo Odin-aka · Odin-like
- Odo Old High German Odo · Wealthy or prosperous
- Odochi Igbo Odo-chi · Odo's daughter, tied to wealth
- Ododo Igbo Odo-do · Prosperity times two
- Odón Greek odós · Origin and meaning uncertain
- Odonkor Ga/Adangbe · Stone warrior
- Odunayo Igbo odu-nayo · The pain/sorrow is gone
- Ofelia Greek Ophelia · Help or succor
- Offiong Annang offiong · left side
- Ofodile Igbo ofo-dile · One who walks with his father
- Ofon Igbo ofon · Home
- Ofori Akan ofori · Blacksmith
- Oganda Luhya oganda · Of the homeland
- Ogechi Igbo oge-chi · Daughter of Oge
- Ogechukwu Igbo Oge-Chukwu · God's daughter or daughter of the almighty
- Ogheneruona Edo Oghene-ruona · God's blessing or divine favor
- Ognjen Slavic · Fiery or of fire
- Ogochukwu Igbo Ogo-Chukwu · Daughter of God
- Ogutu Maasai ogutu · Warrior or brave one
- Oğuz Turkic/Turkish · Oguz
- Ohana Hawaiian · Family
- Oier Basque/unclear · Basque origin, meaning unclear
- Oihan Basque · Forest or woodland
- Oihana Basque oihana · Forest
- Oisin Irish · Little deer
- Oiva Finnish/Norse · Finnish, meaning unclear
- Ojas Sanskrit · Vital energy
- Ojasvi Sanskrit · Bright energy
- Ojedapo Yoruba oje-dapo · One who gives prosperity
- Ojima Igbo ojima · Family keeper
- Okafor Igbo · Born on market day
- Oke Old High German Oke · Sharp or keen
- Okechukwu Igbo Oke-Chukwu · Oke is great
- Okello Luo okello · Born at a time of plenty
- Oketch Luo oketch · Birth or natural circumstances
- Okhaivoh Esan okhaivoh · God is great
- Okoth Luo okoth · Born at a time of cold
- Oksana Russian Oksana · Hospitable or welcoming
- Oktaw Latin Octavus · eighth
- Oktawia Latin Octavia · Eighth
- Oktawian Latin Octavianus · Of the eighth
- Okubona Igbo oku-bona · One who is well-known
- Okunle Yoruba Okunle · I was born with wealth
- Okunola Yoruba Okunola · Born with wealth
- Okyere Akan okyere · Worthy or deserving one
- Ola Arabic · To be tall, ascending
- Olabisi Yoruba ola-bisi · Wealth has multiplied
- Oladapo Yoruba ola-dapo · Chief arrives
- Oladele Yoruba ola-dele · Chief returns home
- Oladimeji Yoruba ola-dimeji · Chief twice
- Olaf Old Norse · Ancestral heir
- Olagoke Yoruba ola-goke · The chief is crowned
- Olaia Greek olaia · Oil maker; olive-related
- Olajide Yoruba ola-jide · Chief awakens or chief wakes up
- Olajumoke Yoruba ola-jumoke · Chief has become wealthy
- Olamide Yoruba ola-mide · My chieftaincy/wealth is my glory
- Olaniran Yoruba ola-niran · Chief wakes up again or chief rises again
- Olaniyi Yoruba ola-niyi · Chief has honor or chief is dignified
- Olanna Igbo/Yoruba ola-na · Something is precious
- Olanrewaju Yoruba (NG) · Wealth arrives in the future
- Olasubomi Yoruba (NG) · My wealth deserves reverence
- Olasunkanmi Yoruba (NG) · Wealth possesses me
- Olasupo Yoruba (NG) · Increasing wealth
- Olatoye Yoruba (NG) · Earned wealth or deserved honor
- Olatunde Yoruba (NG) · Wealth returns
- Olaug Old Norse (NO) · Ancestor's awe
- Olav Old Norse (SE/NO) · Ancestor's heir
- Olawale Yoruba (NG) · Wealth comes home
- Olayinka Yoruba (NG) · Wealth is praised
- Olayiwola Yoruba (NG) · Surrounded by wealth
- Oldert Germanic (NL) · Old and bright
- Ole Old Norse diminutive · Ancestor or heir
- Olea Norwegian/Norse · Ancestor's descendant; olive tree
- Oleg Old Norse/Slavic (PL/RU) · Holy or blessed
- Olegário Latin/Portuguese (PT) · Connected to oil
- Oleh Ukrainian/Norse · Holy, blessed, or sacred
- Olek Slavic · Defender helper
- Oleksandr Slavic · Defender of men
- Oleksandra Ukrainian · Defender of men, mankind, or people
- Oleksii Ukrainian/Slavic · Defender or protector of men or mankind
- Olena Slavic · Shining light torch
- Olfert Germanic (DK) · Old traveler
- Olga Old Norse · Holy
- Olgierd Lithuanian/Polish · All famous, widely heard of
- Oli Latin-English · Olive tree planter
- Oliana Hawaiian/Spanish · Joyful, heavenly light
- Olimpia Greek (PL/IT) · Of Olympus, divine
- Olindo Italian · Holy fragrant
- Olive Latin-English · Olive
- Oliver Old Norse/Latin · Olive tree
- Olivia Latin/literary · Olive tree or living one
- Olivier Latin · Olive tree, peace
- Oliviia Latin · Olive tree; symbol of peace, wisdom, fertility
- Olivija Latin · Olive tree; symbolizing peace, wisdom, fertility
- Oliwer Latin/Polish (PL) · Olive grower
- Oliwia Polish · Olive tree; peace
- Oliwier Polish/Latin · Olive tree
- Olla Germanic/Slavic (NL) · Holy
- Olle Old Norse (SE) · Ancestor
- Olli Old Norse/Finnish (FI) · Ancestor
- Ollie Latin-English · Olive tree
- Ollo Unknown · Ancestral heritage
- Olly English · From Oliver; olive tree planter or elf army
- Olof Old Norse-Swedish · Ancestor
- Olonkpa Igbo (NG) · Cultural significance
- Oloruntoba Yoruba (NG) · God is sufficient
- Olti Albanian/Turkic · Albanian gold; linked to Olt River, suggesting brightness and resilience
- Oluf Old Norse (DK) · Ancestor's wolf
- Olufemi Yoruba (NG) · The chief loves me
- Olufunmilayo Yoruba (NG) · Chief gave me joy
- Olugbenga Yoruba (NG) · The chief brings honor
- Olumayowa Yoruba (NG) · The chief is not made ours
- Olumide Yoruba · God is here
- Oluremi Yoruba (NG) · The chief pleases me
- Oluseun Yoruba (NG) · To honor the chief
- Olusola Yoruba (NG) · The chief acquires
- Oluwabunmi Yoruba (NG) · God has given me
- Oluwadamilare Yoruba (NG) · God gave me my return
- Oluwadamilola Yoruba (NG) · God gave me wealth
- Oluwadarasimi Yoruba · God has been good to me
- Oluwadayo Yoruba (NG) · God brings joy
- Oluwafemi Yoruba (NG) · God loves me
- Oluwaferanmi Yoruba (NG) · God loves me, emphasizing care
- Oluwafunke Yoruba (NG) · God has honored me
- Oluwakayode Yoruba (NG) · God's chosen one arrived
- Oluwakemi Yoruba (NG) · God protects and honors me
- Oluwaleke Yoruba (NG) · God multiplies and increases
- Oluwasenubi Yoruba (NG) · Richly blessed by God
- Oluwaseun Yoruba (NG) · To praise God
- Oluwaseyi Yoruba (NG) · God multiplies me
- Oluwatobi Yoruba (NG) · God is great
- Oluwatobiloba Yoruba (NG) · God is a great conqueror
- Oluwatokunbo Yoruba (NG) · God deserves respect
- Oluwatomisin Yoruba (NG) · God's wisdom is mine
- Oluwatoyin Yoruba (NG) · God brings joy
- Oluwole Yoruba (NG) · God has entered the home
- Olwethu Zulu (ZA) · Ours, belonging to us
- Olympe Greek · From Mount Olympus, home of the gods
- Olympia Greek · From Mount Olympus, home of the gods
- Omar Arabic · Flourishing, thriving
- Omara Swahili (KE) · Long life
- Omari Arabic/Swahili (KE) · Life or long-lived
- Ombati Maasai (KE) · Maasai cultural name
- Ombeline French · Little shadow
- Omer Hebrew · Sheaf of grain
- Omolade Yoruba (NG) · Child of royalty
- Omolara Yoruba (NG) · Child is distinguished
- Omolayo Yoruba (NG) · Child brings joy
- Omolo Luo (KE) · Young man or boy in Luo culture
- Omondi Luo (KE) · Luo: Omondi is a patronymic Luo name
- Omotola Yoruba · Child is as precious as wealth
- Omotunde Yoruba (NG) · Child returns again
- Omri Hebrew · Life, sheaf
- Onalenna Setswana (ZA) · Gives a blessing
- Ondine Latin/French · Wave or little wave
- Ondřej Greek-Czech · Manly or brave
- Oneca Basque (ES) · Basque: origin unclear
- Ongile Setswana/Zulu (ZA) · One who is good/beautiful
- Ongoro Luo/Maasai (KE) · Cultural name
- Onintza Basque (ES) · Possibly goodness
- Onkabetse Setswana (ZA) · Truly helps
- Onke Zulu/Setswana (ZA) · Gift
- Onni Finnish (FI) · Luck, happiness
- Onno Germanic/Low German (DE/NL) · Small wealth
- Onosetale Sotho (NG/ZA) · In Sotho cultural context
- Ons Arabic · Arabic: companionship, sociability, intimacy, friendliness, warmth, solace
- Onsarigo Luo (KE) · Luo cultural name
- Onur Turkish/Arabic (TR) · Honor or glory
- Onuța Romanian/Hebrew · Grace or favor
- Onyambu Luo (KE) · Within Luo cultural traditions
- Onyango Luo (KE) · First-born or big eye
- Onyeka Igbo (NG) · Connected to family or personal meaning
- Onyinyechi Igbo (NG) · Who is like me
- Onyonka Luo (KE) · Within Luo genealogical traditions
- Onyura Luo (KE) · Luo cultural name
- Oona Irish/Old Norse (FI) · Unity, lamb
- Oonagh Irish · From Old Irish úan, meaning lamb
- Opal Sanskrit-English · Precious stone
- Opale Sanskrit/Greek · Gemstone opal, meaning jewel
- Opeyemi Yoruba (NG) · Covered/protected for me
- Ophelia Greek · Help, Benefit
- Ophélie French · Help assistance
- Opiyo Luo (KE) · Tied to Luo cultural traditions
- Opoku Akan (GH) · Akan cultural name
- Oppong Akan (GH) · Akan name of clan affiliation
- Ora Latin/Hebrew · Prayer, edge, shore, light
- Oran Gaelic/Hebrew · Little pale green one, pine tree
- Oratile Setswana (ZA) · The brave one
- Orazio Latin/Italian (IT) · Of the hours, of time
- Ordoño Spanish (ES) · Noble rank
- Ore Yoruba (NG) · Yoruba: "Ore" means friend in Yoruba.
- Oren Hebrew · Hebrew: pine tree or ash tree
- Orengo Bantu/Luo (KE) · Bantu or Luo origin, unclear
- Oreoluwa Yoruba (NG) · God is my friend
- Orest Greek · Mountain dweller
- Oreste Greek/Italian (IT) · Of the mountain
- Orges Albanian · Albanian origin; possibly meaning to work, to create, mountain, or king
- Orhan Turkish/Arabic (TR) · Wise leader
- Ori Hebrew · My light
- Oria Latin/Hebrew · Golden; my light, God is my light
- Oriana Latin · Golden, dawn, or the golden one
- Oriane French · Golden sunrise
- Oriang Luo (KE) · Luo origin, meaning unclear
- Orin Irish/Scottish · From Irish/Scottish Gaelic pale green or sallow-haired, and Hebrew pine tree
- Orinda Maasai/Bantu (KE) · Maasai origin, meaning unclear
- Oriol Catalan/Spanish (ES) · Golden, oriole bird
- Orion Greek · Greek mythological hunter; means boundary or limit
- Orla Irish-Gaelic · Golden princess or golden sovereignty
- Orlagh Irish/Gaelic · Golden princess
- Orlah Irish/Celtic · Golden princess or golden lady
- Orlaith Irish · Golden princess
- Orlanda Germanic/Italian (IT) · Famous throughout the land
- Orlando Old Germanic · Famous throughout the land
- Orlane French/Latin · Golden or of gold
- Orli Hebrew · My light
- Orm Old Norse (DK) · Serpent or dragon
- Ornella Italian · Flowering ash tree
- Oroitz Basque (ES) · Golden speech
- Oronzo Italian (IT) · Golden, gold
- Orphée French/Greek · French form of Orpheus, legendary Greek musician
- Orran Scottish/Gaelic · Dun-colored, pale green, light, or song
- Orrin Irish/Gaelic · Greyish brown, tan, or pale green
- Orso Italian · Bear, strength, protectiveness
- Orsola Italian · Little bear
- Orson Latin/French · Bear cub or little bear
- Ortensia Latin/Italian (IT) · Of the garden
- Ortlinde Germanic (DE) · Edge of linden tree
- Orugbulem Igbo (Nigeria) · One who brings wealth
- Orvar Old Norse · Edge warrior or spear edge
- Osagie Edo (Nigeria) · Gods wish or Gods favor
- Osaid Arabic · Lion cub or young lion, symbolizing bravery and strength
- Osama Arabic · Like a lion
- Osarumen Edo (Nigeria) · God has given
- Osbert Old Germanic · Divine brightness
- Oscar Old Norse · Divine spear
- Osei Akan (Ghana) · Noble or well-born
- Osian Welsh/Irish · Little deer or fawn
- Osiro Luo (Kenya) · Tied to Luo cultural traditions
- Osita Igbo (Nigeria) · Strong or mighty one
- Oskar Old Norse · Divine spear
- Osman Arabic · Bustard bird
- Osmar Germanic-Brazilian Portuguese · Divine fame
- Osmo Finnish/Germanic · Finnish diminutive, Germanic root
- Osmund Old Norse · Old Norse "os"
- Osmundo Osmund variant · Old Norse "os"
- Ossian Irish/Scottish · From Old Irish os,' meaning deer or fawn; suggests swiftness or grace
- Ostap Slavic · Steadfast one
- Osuagwu Igbo (Nigeria) · One who conquers or warrior
- Osvald Old Norse · Old Norse "os"
- Osvaldina Osvald variant · Old Norse "os"
- Osvaldo Germanic-Spanish-Italian · Old English "os"
- Oswald Old English/Germanic · Old English "os"
- Oswin Old English · Old English "os"
- Ota Germanic/Slavic · Wealth, fortune, or prosperity
- Otakar Slavic · Prosperous warrior
- Otavio Latin-Portuguese · Eighth
- Otfried Old Germanic · Prosperous peace
- Othman Arabic · Bustard bird
- Othmane Othman variant · Bustard bird
- Otiende Luo (Kenya) · Connected to Luo traditions
- Otieno Luo (Kenya) · Born during rain
- Otilia Latin · Fortune
- Otis English-Greek · Wealth
- Oto Germanic · Wealth or fortune
- Otoo Akan/Ga (Ghana) · Tied to Akan or Ga cultural traditions
- Otso Finnish · Bear
- Ottar Old Norse · Fragrant essence or precious oil
- Ottavia Latin · Eight
- Ottavio Latin-Italian · Eighth
- Ottilia Latin/Germanic · Latin Otilis, fortune and wealth
- Ottilie Germanic · Wealth and fortune
- Otto Old Germanic · Wealthy
- Otu Akan/Ga (Ghana) · Akan/Ga cultural name
- Otukpo Idoma (Nigeria) · Idoma name from Benue State
- Otylia Polish variant · Polish feminine form
- Ouafae Arabic · Faithfully loyal
- Oualid Arabic · Newborn child
- Ouassim Arabic · Generous or noble
- Ouiam Arabic · Harmonious pact
- Ouko Luo (Kenya) · Tied to Luo cultural traditions
- Ouma Luo/Bantu (Kenya) · Born after twins
- Oumaima Arabic · Mother
- Oumar Arabic/West African · Signifies life, longevity, or flourishing
- Oumaya Arabic · Gentle woman, little mother
- Oumayma Arabic · From Arabic umm (mother), conveying nurturing and maternal tenderness
- Oumou West African/Arabic · Mother, dignity, wisdom, maternal strength
- Oumy West African/Arabic · Mother or caring mother; nurturing and care
- Ourania Greek · Heavenly
- Ouroana Portuguese · Origin and meaning uncertain
- Ousayd Arabic · Little lion or young lion, from Arabic Asad (lion)
- Ousman Arabic · Baby snake or baby bustard; also wise or chosen one
- Ousmane Arabic · Arabic: the chosen one, the blessed one, or wise
- Oussama Arabic · Lion or young lion, symbolizing strength and courage
- Oussayd Arabic · Lion, little lion, young lion
- Outi Finnish · Finnish diminutive
- Ouways Arabic · Little wolf, symbolizing quiet strength, loyalty, and independence
- Ouweys Arabic · Little wolf, wolf cub; symbolizing courage, loyalty, quiet strength
- Ova Latin/Slavic · Egg; new life, fertility, beginnings
- Ove Old Norse · Ancestor or grandfather
- Ovie Edo/Ijaw (Nigeria) · Tied to coastal traditions
- Owain Welsh · Young warrior
- Owais Arabic · Arabic for wolf, interpreted as little wolf
- Owamenakpo Edo (Nigeria) · Tied to gratitude
- Oways Arabic · Little wolf
- Owen Welsh · Young warrior
- Owenn Welsh/Irish · Noble, youthful, well-born, or young warrior
- Owidiusz Latin/Polish · Sheep farmer
- Owino Luo (Kenya) · Tied to Luo cultural heritage
- Owuor Luo (Kenya) · Tied to Luo family traditions
- Owuraku Akan (Ghana) · Tied to Akan cultural traditions
- Owusu Akan (Ghana) · Ghanaian Akan surname/given name
- Oxana Slavic/Greek · Hospitality, guest-friendship; praise be to God
- Oyindamola Yoruba (Nigeria) · Honey brings joy
- Oyinkan Yoruba (Nigeria) · Surrounded by wealth
- Oyugi Luo (Kenya) · Tied to Luo traditions
- Ozan Turkish · Bard, poet, or minstrel (Old Turkic oz)
- Ozanildo Portuguese/Brazilian · Rare Brazilian compound name
- Ožbej Slovenian · Divine power, power or ruler, bear
- Ozioma Igbo (Nigeria) · Good fortune or good luck
- Ozzie English/Germanic · Germanic god's power or divine ruler,' and Hebrew strength.'
- Ozzy English/Norse · Old English and Old Norse: divine power or God's protection