Baby Names That Start With O: 24 Girl & Boy Names With Meanings
O names are round, open and warm, from the ever-popular Olivia and Oliver to rare finds like Ottilie and Orlando. This list gathers 24 names that start with O, with the meaning, origin and a short note on each.
Reviewed
Where an origin is uncertain, as with Orion and Oona, we say so. Names are grouped by gender and ordered roughly from classic to distinctive.
Our top picks
Girl names (12)
- OctaviaLatineighthRegal and rare; nickname Tavi.
- OdessaGreekfrom the city of OdessaRare and romantic.
- OdetteGermanic / FrenchwealthThe swan princess of 'Swan Lake'.
- OliveLatinthe olive treeA vintage nature name.
- OliviaLatinolive treeA top girls' name for years.
- OlympiaGreekfrom Mount OlympusGrand and glamorous.
- OonaIrishuncertain; sometimes read as 'lamb' or 'one'Soft and unusual.
- OpalSanskritjewel, gemA gemstone name that is vintage again.
- OpheliaGreekhelp, aidLiterary and romantic.
- OrianaLatingolden (from aurum)Ornate and rare.
- OrlaIrishgolden princessA short, bright Irish name.
- OttilieGermanicprosperity in battleVintage and quirky.
Boy names (10)
- OscarIrishdeer loverA friendly classic.
- OdinNorsefrenzy, inspiration (the chief Norse god)Strong and mythic.
- OliverLatin / Frencholive treeA top boys' name for years.
- OmarArabicflourishing, long-livedA widely used and loved name.
- OrionGreekuncertain; the hunter of Greek myth and a constellationCelestial and bold.
- OrlandoItalianfamous land (from Roland)Romantic and Shakespearean.
- OsmanArabic / Turkishbaby bustard, a birdThe founder of the Ottoman dynasty.
- OtisGermanicwealthySoulful and short.
- OttoGermanicwealthA palindrome that is quirky and cute.
- OwenWelshyoung warrior or noble (uncertain)A friendly Welsh classic.
Unisex names (2)
- OceanEnglishthe seaA bold word-name.
- OnyxGreekthe black gemstoneDark and rare.
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How to choose
The olive family
Olivia, Oliver, Olive and Ollie all share the olive tree as a symbol of peace. It gives the family of names a clear, gentle meaning.
Literary O names
Ophelia, Orlando and Oberon all come from Shakespeare. They are dramatic, memorable choices.
Nicknames
Oliver gives you Ollie, Olivia gives you Liv and Livvy, and Octavia gives you Tavi. All are easy and friendly.
Frequently asked questions
What are the most popular baby names that start with O?
Olivia, Oliver and Owen are the best-known O names, and Ophelia and Orion are distinctive alternatives.
What are unique baby names that start with O?
Ottilie, Octavia, Orla, Oona, Orlando and Otis are rarer but easy to pronounce.
What are gender-neutral baby names that start with O?
Ocean and Onyx are used for any gender.
What do O names mean?
Olivia and Oliver both mean 'olive tree', Oscar means 'deer lover', and Orla means 'golden princess'.
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