AHEAD: The ultimate list of “O” girl names… and which could go viral this year.
If you’re looking for beautiful girl names that start with O, you’re in the right place!
I’ve rounded up every single “O” name that’s even the slightest bit modern and cool.
Below you’ll find over 60 unique names, their meanings, and current popularities.
You’ll also find a shortlist of O names poised to go viral in 2025.
Related: Boy Names that Start with O

“O” names trending in 2025
These girls’ names starting with O are climbing the charts right now, each making significant gains since last year.
Oaklee or Oakleigh
- Name meaning: Meadow of oak trees.
- Popularity: Oaklee ranks #445 (↑20) and Oakleigh ranks #508 (↑16).
Opal 🔥
- Name meaning: Precious stone.
- Popularity: #488 (↑37)
More on 2025 viral predictions in just a bit.
Popular girl names that start with O
These O names for girls are ranked in the top 1000.
Oakley
- Name meaning: Meadow of oak trees.
- Popularity: #153
Oaklynn or Oaklyn
- Name meaning: Oak lake.
- Popularity: The tree name Oaklynn ranks #157 and Oaklyn ranks #580.
Ocean
- Name meaning: Body of water.
- Popularity: This water name ranks #826 for girls and #609 for boys.
Octavia
- Name meaning: Eighth.
- Popularity: #279
Olive
- Name meaning: Fruit of an olive tree.
- Popularity: #181
Olivia
- Name meaning: Olive tree.
- Popularity: #1
Related: Middle Names for Olivia
Ophelia
- Name meaning: Help.
- Popularity: #267
Vintage “O” names for girls
These old-fashioned “O” baby names evoke the magic of another era.
Odelia
- Name meaning: Praise God.
- Popularity: This name ending in a isn’t ranking.
Odessa
- Name meaning: Long journey.
- Popularity: This 3-syllable name isn’t ranking.
Odette or Odetta
- Name meaning: Wealthy.
- Popularity: Neither version of this 6-letter name is ranked.
Olga
- Name meaning: Blessed or holy.
- Popularity: This short name isn’t ranking.
Olympia
- Name meaning: Mount Olympus, the abode of the gods in Greek mythology.
- Popularity: This royal name isn’t ranking.
Ora
- Name meaning: Prayer or light.
- Popularity: Very popular in the late 1800s, this 3-letter name isn’t ranking.
Oriana or Orianna
- Name meaning: Sunrise.
- Popularity: This sun-inspired name isn’t ranking.
Orla
- Name meaning: Golden princess.
- Popularity: This Irish name isn’t ranked in the U.S., but is quite popular in England and Scotland.
Ottilie
- Name meaning:
- Popularity: This vintage German name isn’t ranking.
More vintage O names that are likely past their prime: Ottoline, Oda, Oenone, Oneida, Osla, Otilda/Othilda, Ozella, Oma, Ottie, Orlena, Ola, Odile, Oveline
Unique girl names that start with O
These O names for girls are a little different!
👉🏼 Jump ahead to 2025 viral predictions if you wish!
Oakland
- Name meaning: From the oak tree land.
- Popularity: This city-inspired baby name isn’t ranking.
Oak or Oakes
- Name meaning: Large trees with long lifespans.
- Popularity: Neither version of this one-syllable name is ranking. Great middle name!
Oceana
- Name meaning: Of the ocean.
- Popularity: This perfect mermaid name isn’t ranking.
Oliana or Oleana or Oleanna
- Name meaning: A poisonous evergreen shrub with beautiful flowers.
- Popularity: No spellings of this 4-syllable name are ranked.
Onyx
- Name meaning: A layered black stone.
- Popularity: This badass name ranks #308 for boys but isn’t ranking for girls.
Oona
- Name meaning: Unity.
- Popularity: This 4-letter name isn’t ranking.
Ophelie
- Name meaning: Help.
- Popularity: This elegant name isn’t ranking.
Ophira
- Name meaning: Gold.
- Popularity: This Hebrew name isn’t ranking.
Orchid
- Name meaning: Uniquely shaped flowering plant.
- Popularity: This floral O name isn’t ranking.
Orinda
- Name meaning: Pine trees or gold. (True meaning unknown).
- Popularity: This exotic name isn’t ranking.
Orly or Orli
- Name meaning: A suburb of Paris.
- Popularity: Neither spelling of this modern O name is ranking.
Rare and unusual girl names that start with O
You don’t hear these O names every day!
👉🏼 Jump ahead to 2025 viral predictions if you wish!
Octave
- Name meaning: An interval between musical notes.
- Popularity: This edgy name isn’t ranking.
Odella
- Name meaning: Small wealthy one.
- Popularity: This unique O name isn’t ranking.
Odilia
- Name meaning: Wealthy and prosperous.
- Popularity: This name isn’t ranking.
Odyssia
- Name meaning: Long journey.
- Popularity: This long name isn’t ranking.
Ohanna
- Name meaning: Grace.
- Popularity: This name isn’t ranking.
Ohara
- Name meaning: From the plain.
- Popularity: This unique name isn’t ranking.
Olaya
- Name meaning: Rising sun.
- Popularity: This 5-letter name isn’t ranking.
Olena or Olenna
- Name meaning: Torch or bright one.
- Popularity: Neither version of this O name is ranking.
Olesia
- Name meaning: Protector.
- Popularity: This unique O name isn’t ranking.
Olivera or Oliveria
- Name meaning: Olive tree.
- Popularity: Neither version of this name is ranking.
Olivetta
- Name meaning: Little olive.
- Popularity: This rare name isn’t ranking.
Omaira or Omayra
- Name meaning: Long life, red, or star.
- Popularity: Neither version of this O name is ranking.
Omarosa
- Name meaning: Flourishing.
- Popularity: This unusual O name isn’t ranking.
Ombra
- Name meaning: Shadow.
- Popularity: This name isn’t ranking.
Opalina
- Name meaning: Like an opal.
- Popularity: This rare O name isn’t ranking.
Oriane or Orianne
- Name meaning: Sunrise.
- Popularity: Neither version of this O name is ranking.
Orietta
- Name meaning: Golden.
- Popularity: This unique O name isn’t ranking.
Orina
- Name meaning: Peace.
- Popularity: This great hippie name isn’t ranking.
Orleanna
- Name meaning: Golden.
- Popularity: This name isn’t ranking.
Orna
- Name meaning: Pine tree.
- Popularity: This name isn’t ranking.
Orphea
- Name meaning: Darkness.
- Popularity: This name isn’t ranking.
Orsa
- Name meaning: Bear.
- Popularity: This name isn’t ranking.
Osanna
- Name meaning: Save us.
- Popularity: This name isn’t ranking.
Osha
- Name meaning: Protected by God.
- Popularity: This name isn’t ranking.
Otilia or Ottilia
- Name meaning: Prosperous in battle.
- Popularity: Neither of these O names is ranking.
Ozara
- Name meaning: Pearl.
- Popularity: This unique O name isn’t ranking.
Will any girl names that start with O go viral in 2025?
Yes, I believe so!
There is one stand-out name poised for dramatic growth — and two additional names worth watching.
Opal
Among girl names that start with O, Opal is the one to watch!
After nearly 60 years of absence from the top 1000, this ethereal gemstone name has engineered a stunning comeback, climbing from #848 to #488 in just six years.
The recent acceleration is particularly noteworthy – gaining 37 spots in 2023 after a 20-spot jump in 2022 – showing mounting momentum that suggests this is just the beginning of Opal’s resurgence.
Interestingly, this O name peaked at #81 in 1911, proving its potential ceiling is still far above its current ranking.
Pop culture is helping fuel Opal’s revival, with notable characters in Steven Universe, The Legend of Korra, and The Raven Cycle introducing the name to new generations.
Opal combines multiple trending elements: a nature connection through its gemstone origins, vintage charm (fitting with names like Pearl and Ruby), and the short, strong sound dominating today’s charts.
The name has a rich history of notable bearers, from pioneering aviatrix Opal Kunz to nature writer Opal Whiteley, giving it substance beyond its beautiful sound.
Oaklee and Oakleigh
Parents seeking girl names that start with O are falling hard for the Oak- family of names, with three variants now showing distinct patterns of success.
While Oakley blazed the trail and now sits comfortably at #153, its cousins Oaklee and Oakleigh are the ones to watch in 2025.
Oaklee has shown remarkable momentum, climbing 500 spots since its 2017 debut to reach #445. The name saw massive jumps of 136 positions in both 2020 and 2021, and while its pace has moderated, it continues to rise steadily with 685 baby girls receiving the name in 2023.
Meanwhile, Oakleigh (#508) has demonstrated its own impressive trajectory, leaping from #857 in 2019 to its current position. The -leigh ending taps into a major naming trend, helping push this variant to 596 uses in 2023.
Both names benefit from their sweet-spot ranking positions (400-600 range), where viral growth often occurs, making them prime candidates for significant gains in the coming years.

Nicknames for girl names that start with O
These are great if you love long names but want a shorter O-initial nickname.
👉🏼 Jump ahead to middle name ideas if you wish.
Oakie
Short for: Oak, Oaklee, Oakleigh, Oakley, Oaklyn
Ollie
Short for: Olivia, Olive, Oleana, Oliana
Ori or Orie
Short for: Oriana, Orianna, Oriane, Orianne
Ottie
Short for: Ottilie, Ottoline, Otilda
Ola
Short for: Oliana, Oleana, Orlena
Nicknames that don’t start with O:
Liv or Livvie
Short for: Olivia
Lia
Short for: Olivia, Odelia, Ophelia
Via
Short for: Olivia
Tavi
Short for: Octavia
Lina
Short for: Oliana, Ottoline, Oveline
Ana
Short for: Oriana, Orianna, Oliana
Pia
Short for: Olympia
Middle name ideas for baby girl names starting with O
Here are some beautiful first + middle name combinations for a first name with “O” as the first letter.
- Oak Embry
- Oak Lennox
- Oakland Eve
- Oakland Lily
- Oakleigh Ella
- Oakley Sage
- Oaklyn Avery
- Oaklynn Jade
- Ocean Lavender
- Ocean Lennox
- Octave Addilyn
- Octave Rylan
- Octavia Everly
- Octavia Grace
- October Rose
- October Ruby
- Odelia Emma
- Odelia Marie
- Odessa Belle
- Odessa Scarlett
- Odette Pearl
- Odette Rose
- Ohana Hadley
- Ohana Sage
- Oleanna Madelyn
- Olga Hazel
- Olga Victoria
- Oliana Hadley
- Olive Blakely
- Olive Penelope
- Olivia Charlotte
- Olivia Violet
- Ollie Alexandra
- Ollie Sophia
- Olympia Faye
- Olympia Palmer
- Onyx Mackenzie
- Onyx Phoenix
- Opal Juliette
- Opal Rayne
- Ophelia Evelyn
- Ophelia Madison
- Oprah Abigail
- Oprah Lilianna
- Orchid Brooke
- Orchid Everleigh
- Oriana Mia
- Orianna Piper
- Orinda Reese
- Orinda Rylan
- Orion Paige
- Orion Sophie
- Orla Hartley
- Orla Magnolia
- Orleans Avery
- Orleans Hart
- Orly Abigail
- Orly Blake
- Owen Aubrey
- Owen Hadley
Girl Names that Start with O: Trend Analysis
There are only 11 “O” names ranked in the top 1000 for girls – a surprisingly small number for such a strong initial sound.
Olivia continues its reign at #1, marking an incredible journey since the 1990s. While some experts predict its eventual decline (following Emma’s pattern), its classic literary roots and balanced sound suggest it won’t fall far, fast.
Nature-inspired “Oak” names are having a moment, with five variations in the rankings: Oakley (#153), Oaklynn (#157), Oaklee (#445), Oakleigh (#508), and Oaklyn (#580). Their rustic, strong imagery appeals to parents seeking nature connections.
What’s fascinating is the absence of many vintage O-names. Beautiful classics like Odette (of Swan Lake fame), Olympia (with its powerful Greek heritage), and Ottilie (a German gem) remain unranked despite the general revival of vintage names.
Ocean (#826) represents the only pure nature name besides the Oak variants, though its 2023 ranking shows potential for growth in our climate-conscious era.
Classical choices Octavia (#279) and Ophelia (#267) provide sophisticated options with literary connections, while Opal (#488) – the gemstone name – has seen steady growth, with a 37% increase since 2020.
The simple, understated Olive (#181) bridges the gap between vintage and modern tastes.
Looking ahead to 2025, expect to see continued strength in the Oak-family names, particularly Oaklee and Oakleigh, which showed strong momentum in 2023.
Keep an eye out for potential breakout vintage O-names, with Ottilie and Odette showing particular promise among style-forward parents.

Final thoughts on girl names that start with O
Before you make your daughter’s name o-fficial, here are a few questions worth asking yourself:
-
- How often will others assume the wrong spelling of the name? If you go with Oaklee, for example, most people will default to the spelling of Oakley until corrected. Think about whether this may bother your daughter one day.
- Will young kids be able to pronounce the name? It’s really common for little ones to have trouble pronouncing letters and sounds such as “R”, “S”, “L”, “Th”, and “Z”. Names like Orly and Odessa might be hard for your daughter and her friends to say for a few years. Again, think about whether this matters to you—it may not.
- Do her initials spell anything undesirable? The first initial O is relatively safe (compared to other letters), but you should do a Google search of your baby’s initials before finalizing them.
- Is the name going to prompt repeated questions? If you name your daughter October, for example, it’s a safe bet that she will regularly be asked whether she was born in that month.
- Is the name too similar to other living family members? You might want to skip the O name Olivia if your daughter’s cousin is named Oliver.
Ultimately, you and your partner should choose whichever girl name that starts with O that makes you the happiest. It’s a very personal decision that only you can make!
Congratulations and good luck choosing the perfect O name for your baby girl!

The source for popularity data is SSN.
This article was originally published on Dec 27, 2021 and was updated on Jan 12, 2025.