AHEAD: The ultimate list of “O” girl names.
If you’re looking for a beautiful girls’ name starting with the letter O, you’re in the right place!
Below, I’ve rounded up every single “O” name that’s even the slightest bit modern and cool.
I’ve also included each name’s meaning and current popularity—which will hopefully help you narrow down your list of favorites.
There are very few O names in the top 1000. Including spelling variations, there are just 10 O names ranking. Excluding spelling variations, there are only 7!
This is nothing compared to the 101 names starting with M ranking in the top 1000, for example.
Other than the #1 baby name in the country, Olivia, there are no other O names ranking in the top 100.
There’s just one name ranking in the top 200 (Olive at #197) and one name in the top 300 (Oakley at #281).
The options are limited, but all of the good ones are right here!
Without further ado, let’s go check out these baby name ideas and find the perfect one for your daughter.
Feel free to use the Table of Contents to jump to a specific style, or keep on scrolling and view all of these outstanding girl names that start with O.
Related: Boy Names that Start with O
Table of Contents
Popular “O” names
All of these girl names that start with O are (relatively) popular in the United States right now, ranking in the top 1000.
Oakley or Oaklee or Oakleigh
- Name meaning: Meadow of oak trees.
- Popularity: Oakley ranks #281, Oaklee ranks #620, and Oakleigh ranks #860.
Oaklynn or Oaklyn
- Name meaning: Oak lake.
- Popularity: The tree name Oaklynn ranks #307 and Oaklyn ranks #566.
Octavia
- Name meaning: Eighth.
- Popularity: #335
Olive
- Name meaning: Fruit of an olive tree.
- Popularity: #197
Olivia
- Name meaning: Olive tree.
- Popularity: #1
Opal
- Name meaning: Precious stone.
- Popularity: #659
Ophelia
- Name meaning: Help.
- Popularity: #391
If you liked these trendy “O” girl names you might also like this list of modern girl names or these middle names for Olivia.
Nature “O” names for girls
All of these organic girl names with O as the first letter are inspired by trees, plants, the ocean, and the earth.
Oak
- Name meaning: Large trees with long lifespans.
- Popularity: This cool one-syllable “O” name would make a great middle name and is not currently ranking.
Ocean
- Name meaning: Body of water.
- Popularity: This O name isn’t ranking for girls but ranks #800 for boys.
Oliana or Oleana or Oleanna
- Name meaning: A poisonous evergreen shrub with beautiful flowers.
- Popularity: This organic O name isn’t ranking.
Onyx
- Name meaning: A layered black stone.
- Popularity: This totally badass name ranks #613 for boys but isn’t ranking for girls.
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 unique O name isn’t ranking.
If you like these girl names that start with O you might also like this list of hippie names or these tree names for girls.
Vintage “O” names for girls
Here are some old-fashioned “O” baby names for girls that evoke the magic of another era.
Odelia
- Name meaning: Praise God.
- Popularity: This O name isn’t ranking.
Odessa
- Name meaning: Long journey.
- Popularity: This O name isn’t ranking.
Odette
- Name meaning: Wealthy.
- Popularity: This two-syllable O name isn’t ranking.
Olga
- Name meaning: Blessed or holy.
- Popularity: This short O name isn’t ranking.
Olympia
- Name meaning: From Mount Olympus, as the abode of the gods in Greek mythology.
- Popularity: This long O name isn’t ranking.
If you like these vintage girl names that start with O you might also like this list of Victorian names or these elegant girl names.
Unique “O” names for girls
All of these unique girl names that start with O are interesting and uncommon.
Oakland
- Name meaning: A city on the San Francisco Bay.
- Popularity: This unique O name isn’t ranking.
Octave
- Name meaning: An interval between musical notes.
- Popularity: This O name isn’t ranking.
October
- Name meaning: Tenth month.
- Popularity: This three-syllable O name isn’t ranking.
Ohana
- Name meaning: Hawaiian word for extended family.
- Popularity: This O name isn’t ranking.
Ollie
- Name meaning: A skateboarding maneuver.
- Popularity: This potentially nonbinary O name isn’t ranking.
Oprah
- Name meaning: An invented name that might mean young deer.
- Popularity: This O name isn’t ranking.
Oriana or Orianna
- Name meaning: Sunrise.
- Popularity: This O name isn’t ranking.
Orion
- Name meaning: Hunter constellation.
- Popularity: This space name ranks #326 for boys but isn’t ranking for girls.
Orla
- Name meaning: Golden princess.
- Popularity: This Irish girls’ name is not popular in the United States, but is quite popular in England and Scotland.
Orleans
- Name meaning: A city in central France. Better known in the U.S. with “new” in front of it.
- Popularity: This O name isn’t ranking.
Orly
- Name meaning: A suburb of Paris.
- Popularity: This unique French O name isn’t ranking.
Owen
- Name meaning: Noble or young warrior.
- Popularity: This O name ranks #22 for boys and is not ranking for girls.
If you like unique “O” girl names, you might also like this list of edgy names.
More baby names for girls
Before we get to middle name ideas, here are a few related articles that may be helpful if you’re still looking for the perfect name.
Middle name ideas for baby girl names starting with N
Here are some beautiful first + middle name combinations for a first name with “N” 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
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:
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- 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!
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