Names that start with O
These 144 O names run from Oakley to Özlem, each with its meaning and origin. The most popular in the US in 2025 were Oliver, Olivia and Owen.
Odile
Wealth, fortune (Germanic)
GirlFrench
Olav
Ancestor's descendant (Old Norse)
BoyScandinavian
Oluwatoyin
God is worthy of praise (Yoruba)
GirlAfrican
Oriol
Golden (Latin)
BoySpanish
Ocean
The great sea (Greek). No. 720 in the US in 2025, 720 babies. Given to both: 48% girls.
UnisexEnglishRising
Obed
Serving, worshipping (Hebrew). No. 2,072 in the US in 2025, 72 babies.
BoyEnglish
Oro
Gold (Ladino)
GirlHebrew
Orli
Light for me (Hebrew). No. 5,665 in the US in 2025, 22 babies.
GirlHebrew
Öykü
Story (Turkish)
GirlTurkish
Orovida
Golden life (Ladino)
GirlHebrew
Most popular names starting with O in 2025
Ranked by the number of US babies given each name. Each spelling is counted on its own.
| US rank | Name | Babies | For | 10-year trend | Meaning |
|---|---|---|---|---|---|
| #3 | Oliver | 14,939 | Boys | Rising | olive tree |
| #1 | Olivia | 13,544 | Girls | Rising | olive tree |
| #31 | Owen | 7,190 | Boys | Steady | anglicized form of Owain, possibly from Latin Eugenius |
| #153 | Oaklynn | 1,964 | Girls | Rising | variant of Oaklyn, a blend of Oakley and lyn |
| #156 | Oakley | 1,933 | Girls | Rising | oak clearing |
| #223 | Oscar | 1,620 | Boys | Steady | possibly deer friend |
| #197 | Olive | 1,597 | Girls | Steady | tree of peace |
| #260 | Omar | 1,333 | Boys | Steady | long-lived, flourishing |
| #277 | Otto | 1,241 | Boys | Rising | wealth, fortune |
| #264 | Ophelia | 1,183 | Girls | Rising | help, benefit |
| #334 | Orion | 1,012 | Boys | Steady | – |
| #308 | Octavia | 982 | Girls | Rising | eighth |
| #365 | Onyx | 881 | Boys | Steady | – |
| #423 | Opal | 740 | Girls | Rising | precious stone |
| #454 | Oakley | 688 | Boys | Steady | oak clearing |
| #502 | Odin | 604 | Boys | Steady | frenzy, inspiration |
| #535 | Oaklee | 565 | Girls | Steady | – |
| #549 | Ozzy | 548 | Boys | Steady | – |
| #637 | Oaklyn | 456 | Girls | Steady | – |
| #668 | Oakleigh | 423 | Girls | Steady | – |
| #652 | Otis | 422 | Boys | Steady | wealth, fortune |
| #687 | Omari | 397 | Boys | Steady | – |
| #708 | Ozias | 381 | Boys | Rising | my power is Yahweh |
| #720 | Ocean | 375 | Boys | Rising | the great sea |
| #787 | Ocean | 345 | Girls | Rising | the great sea |
Source: US Social Security Administration baby-name data, 2025. Trend compares the rank with ten years earlier.
O names by the numbers
How many US babies get a name starting with O, counted from Social Security records of names given to at least 5 babies.
Girls
- Share of girls, 2025
- 1.7%
- Place among 26 letters
- 19th
- Different O names
- 180
- In the top 1,000
- 12
Share of girls with an O name: 0.2% in 1950, 0.8% in 2000, and 1.7% in 2025.
Boys
- Share of boys, 2025
- 2.2%
- Place among 26 letters
- 17th
- Different O names
- 243
- In the top 1,000
- 16
Share of boys with an O name: 0.3% in 1950, 0.7% in 2000, and 2.2% in 2025.
O names used in many cultures
Names our database lists in the most languages and countries, easy to spell and say in several of them.
- Oscarpossibly deer friend (Irish Gaelic)
- Oliviaolive tree (Latin)
- Oliverolive tree (Latin)
- Olympiaof Olympus (Greek)
- Ottiliewealth, fortune (Germanic)
- Ottowealth, fortune (Germanic)
- Obadiahservant of God (Hebrew)
- Odinfrenzy, inspiration (Old Norse)
- Olivetree of peace (Latin)
- Olivierolive tree (Latin)
- Ondinawater sprite (Latin)
- Orlagolden ruler, from Órlaith: ór, gold, and flaith, ruler (Irish Gaelic)
- Osmundgod protector (Old English)
- Oswaldpower of a god (Old English)
- Owenanglicized form of Owain, possibly from Latin Eugenius (Welsh)
- Oakleyoak clearing (Old English)
- Oaklynnvariant of Oaklyn, a blend of Oakley and lyn (English)
- Obedserving, worshipping (Hebrew)
Where these names come from
- Hebrew: 22
- Latin: 20
- Greek: 14
- Old Norse: 12
- Irish Gaelic: 10
- Old English: 9
- Germanic: 9
- Yoruba: 9
All 144 names that start with O
| Name | Meaning | Origin | Gender |
|---|---|---|---|
| Oakley | oak clearing | Old English | Unisex |
| Oaklynn | variant of Oaklyn, a blend of Oakley and lyn | English | Girl |
| Obadiah | servant of God | Hebrew | Boy |
| Obed | serving, worshipping | Hebrew | Boy |
| Obinna | father's heart | Igbo | Boy |
| Ocean | the great sea | Greek | Unisex |
| Océane | the ocean | Greek | Girl |
| Ocelotl | jaguar | Nahuatl | Boy |
| Ochieng | born when the sun shines | Luo | Boy |
| Octave | eighth | Latin | Boy |
| Octavia | eighth | Latin | Girl |
| Octavian | eighth | Latin | Boy |
| Octavio | eighth | Latin | Boy |
| Octavius | eighth | Latin | Boy |
| Odd | point of a blade | Old Norse | Boy |
| Oddny | point of a sword and new | Old Norse | Girl |
| Odelia | I will thank God | Hebrew | Girl |
| Odette | wealth, fortune | Germanic | Girl |
| Odharnait | little dun-colored one | Irish Gaelic | Girl |
| Odhiambo | born in the evening | Luo | Boy |
| Odhrán | little dun-colored one | Irish Gaelic | Boy |
| Odile | wealth, fortune | Germanic | Girl |
| Odin | frenzy, inspiration | Old Norse | Boy |
| Ofek | horizon | Hebrew | Boy |
| Ofelia | help | Greek | Girl |
| Ofer | fawn | Hebrew | Boy |
| Ofri | my fawn | Hebrew | Unisex |
| Oihan | forest | Basque | Boy |
| Oisín | little deer | Irish Gaelic | Boy |
| Oiva | splendid | Finnish | Boy |
| Ojas | vigor, vitality | Sanskrit | Boy |
| Okan | archer | Turkish | Boy |
| Oksana | hospitality, a form of Ksenia | Greek | Girl |
| Oksun | jade and gentle (depends on hanja) | Korean | Girl |
| Oktyabrina | October, for the 1917 revolution | Russian | Girl |
| Okuhle | that which is beautiful or good | Zulu | Unisex |
| Ola | life, health | Hawaiian | Unisex |
| Olaf | ancestor's descendant | Old Norse | Boy |
| Olamide | my wealth has arrived | Yoruba | Boy |
| Olav | ancestor's descendant | Old Norse | Boy |
| Oleg | holy, blessed | Old Norse | Boy |
| Olesya | pet form of Oleksandra | Greek | Girl |
| Olga | holy, blessed | Old Norse | Girl |
| Olibhia | olive tree | Latin | Girl |
| Olileanya | hope, expectation | Igbo | Unisex |
| Olimpia | of Olympus | Greek | Girl |
| Olive | tree of peace | Latin | Girl |
| Oliver | olive tree | Latin | Boy |
| Olivia | olive tree | Latin | Unisex |
| Olivier | olive tree | Latin | Boy |
| Oliwia | olive tree | Latin | Girl |
| Ollie | olive tree | Latin | Boy |
| Ollin | movement | Nahuatl | Boy |
| Olof | ancestor's descendant | Old Norse | Boy |
| Olufemi | God loves me | Yoruba | Boy |
| Olumide | my lord has come | Yoruba | Boy |
| Olusegun | God is victorious | Yoruba | Boy |
| Oluwafemi | God loves me | Yoruba | Boy |
| Oluwaseun | we thank God | Yoruba | Unisex |
| Oluwatoyin | God is worthy of praise | Yoruba | Girl |
| Olwen | white footprint | Welsh | Girl |
| Olya | short form of Olga, holy | Old Norse | Girl |
| Olympe | of Olympus | Greek | Girl |
| Olympia | of Olympus | Greek | Girl |
| Olympias | of Olympus | Greek | Girl |
| Omar | long-lived, flourishing | Arabic | Boy |
| Ombeline | from a pet form of Humbert | Germanic | Girl |
| Omer | sheaf of grain | Hebrew | Unisex |
| Omid | hope, expectation | Persian | Boy |
| Omolara | a child is family | Yoruba | Girl |
| Omondi | born at dawn | Luo | Boy |
| Ömür | life | Arabic | Unisex |
| Ona | wave | Catalan | Girl |
| Ondina | water sprite | Latin | Girl |
| Onni | happiness, luck | Finnish | Boy |
| Onóra | honor | Latin | Girl |
| Onur | honor, dignity | Turkish | Boy |
| Onyekachi | who is greater than God? | Igbo | Boy |
| Opal | precious stone | Sanskrit | Girl |
| Opeyemi | gratitude suits me | Yoruba | Girl |
| Ophelia | help, benefit | Greek | Girl |
| Ophélie | help | Greek | Girl |
| Or | light | Hebrew | Unisex |
| Ora | light | Hebrew | Girl |
| Oran | little dun-colored one | Irish Gaelic | Boy |
| Orel | light of God | Hebrew | Boy |
| Oren | pine tree | Hebrew | Boy |
| Oreste | of the mountains | Greek | Boy |
| Orestis | of the mountains | Greek | Boy |
| Ori | my light | Hebrew | Unisex |
| Oriol | golden | Latin | Boy |
| Orit | light | Hebrew | Girl |
| Orla | golden ruler, from Órlaith: ór, gold, and flaith, ruler | Irish Gaelic | Girl |
| Órlaith | golden ruler, from ór, gold, and flaith, ruler | Irish Gaelic | Girl |
| Orli | light for me | Hebrew | Girl |
| Orly | light is mine | Hebrew | Girl |
| Orm | serpent, dragon | Old Norse | Boy |
| Orna | little dun-colored one | Irish Gaelic | Girl |
| Ornella | flowering ash tree | Italian | Girl |
| Oro | gold | Ladino | Girl |
| Orovida | golden life | Ladino | Girl |
| Orpah | back of the neck | Hebrew | Girl |
| Orsola | little bear | Latin | Girl |
| Orson | little bear | Old French | Boy |
| Ortal | light and dew | Hebrew | Girl |
| Ortrud | point and strength | Germanic | Girl |
| Ortrun | point and secret lore | Germanic | Girl |
| Orvar | arrow | Old Norse | Boy |
| Osamu | to govern; to study (depends on characters) | Japanese | Boy |
| Osbert | God and bright | Old English | Boy |
| Osborn | god bear | Old English | Boy |
| Oscar | possibly deer friend | Irish Gaelic | Boy |
| Osher | happiness | Hebrew | Unisex |
| Oshrat | happiness | Hebrew | Girl |
| Osian | little deer | Irish Gaelic | Boy |
| Osip | he will add, a folk form of Joseph | Hebrew | Boy |
| Osman | baby bustard (a bird) | Arabic | Boy |
| Osmond | God and protection | Old English | Boy |
| Osmund | god protector | Old English | Boy |
| Osnat | belonging to the goddess Neith | Ancient Egyptian | Girl |
| Osric | god ruler | Old English | Boy |
| Ossian | little deer | Irish Gaelic | Boy |
| Osvaldo | god's power | Old English | Boy |
| Oswald | power of a god | Old English | Boy |
| Oswin | god friend | Old English | Boy |
| Otávia | eighth | Latin | Girl |
| Otávio | eighth | Latin | Boy |
| Otieno | born at night | Luo | Boy |
| Otis | wealth, fortune | Germanic | Boy |
| Ottar | dread warrior | Old Norse | Boy |
| Ottavia | the eighth | Latin | Girl |
| Ottavio | the eighth | Latin | Boy |
| Ottilie | wealth, fortune | Germanic | Girl |
| Otto | wealth, fortune | Germanic | Boy |
| Ottokar | German form of Odoacer, wealthy and vigilant | Germanic | Boy |
| Ourania | heavenly one | Greek | Girl |
| Owen | anglicized form of Owain, possibly from Latin Eugenius | Welsh | Boy |
| Öykü | story | Turkish | Girl |
| Oz | strength | Hebrew | Boy |
| Ozan | bard, poet | Turkish | Boy |
| Özge | other, different | Turkish | Girl |
| Özgür | free | Turkish | Unisex |
| Ozias | my power is Yahweh | Hebrew | Boy |
| Özlem | longing, yearning | Turkish | Girl |
Frequently asked questions
What are the most popular names that start with O?
The most popular names starting with O in the US are Oliver (#3 for boys), Olivia (#1 for girls), Owen (#31 for boys), Oaklynn (#153 for girls), Oakley (#156 for girls), according to US Social Security Administration data for 2025.
How many names start with O?
In 2025, 180 different girl names starting with O were given to at least 5 US babies each, and 12 of them were in the top 1,000. In 2025, 243 different boy names starting with O were given to at least 5 US babies each, and 16 of them were in the top 1,000. This page lists 144 with their meaning and origin.
How common are girl names that start with O?
1.7% of US girls born in 2025 have a name starting with O, making it the 19th most common first letter. In 1950 it was 0.2%.
How common are boy names that start with O?
2.2% of US boys born in 2025 have a name starting with O, making it the 17th most common first letter. In 1950 it was 0.3%.
Where do names starting with O come from?
The most common origins on this list are Hebrew (22), Latin (20), Greek (14).