Baby Names Starting With O: Popular, Unique & Trending in 2026
Baby Names Starting With O: Popular, Unique & Trending in 2026
O has 658 names — a compact but well-curated collection. O names often feel rounded and whole (it’s in the shape), and they carry a certain gravitas: Oliver, Olivia, Oscar, Owen. There’s no O name that feels throwaway. When you pick an O name, you’re choosing something with real presence.
Most Popular O Names in 2026
The top O names right now:
Olivia — Latin, meaning “olive tree, representing peace, wisdom, and fruitfulness.” Olivia has been the #1 girl name in the US for multiple years running. It’s regal, soft, and impossibly appealing — Liv and Livy are charming everyday forms.
Oliver — Latin, meaning “olive tree, symbolizing peace.” Oliver has climbed to the top of boy name charts across the US, UK, and Australia. It’s literary, dignified, and friendly all at once — Ollie is perfect.
Owen — Welsh, meaning “young warrior, well-born, noble.” Owen is quietly excellent — Celtic heritage, clean sound, and it works at every age.
Oaklynn — English, modern creation from Oak + Lynn. A newer nature-surname hybrid that’s been rising quickly — it brings the botanical appeal of Oak with a soft feminine ending.
Oakley — English, meaning “oak tree clearing, meadow of oaks.” Oakley is gender-neutral and outdoorsy — it has the same rugged-beautiful quality as Ashton or Rowan.
Olive — Latin, meaning “olive tree, symbol of peace.” Olive is the slightly more vintage, understated alternative to Olivia — botanical, peaceful, and quietly stylish.
Oscar — Irish/Norse, meaning “divine spear, deer-lover, champion.” Oscar is a name with both Scandinavian and Irish mythological roots, plus an awards show to its name — distinguished and warm.
Omar — Arabic, meaning “flourishing, long-lived, eloquent.” Omar is deeply rooted in Arabic and Islamic tradition — a strong, meaningful name with beautiful cultural depth.
Ophelia — Greek, meaning “help, assistance, serpent.” Ophelia overcame its Shakespearean tragedy associations and is now considered beautiful and literary — a name that’s genuinely artistic.
Otto — German, meaning “wealth, fortune, prosperity.” Otto is short, palindromic, and completely distinctive — it’s one of those names that sounds both ancient and unexpectedly modern.
Unique O Names Worth Discovering
Rare O names with real character:
Oma — English/Arabic/German origin. In German, Oma means grandmother — but as a given name in other traditions, it’s brief, warm, and entirely distinctive.
Orval — English origin, meaning “golden city, golden hall.” A vintage American name that’s extremely rare — Orval has a rugged, old-frontier quality.
Otha — English origin, variant of Otto. An old American vernacular form of Otto — Southern, rare, and carrying a quiet old-world dignity.
Oleta — English origin, possibly a variant of Aleta or a regional coinage. A soft, musical name that was used in early 20th century American families — rare and beautiful.
Ouida — English origin, from the Victorian novelist who wrote under this pen name (real name Marie Louise de la Ramée). Literary, unusual, and with a one-of-a-kind sound.
O Names by Gender
There are 329 boy names and 259 girl names starting with O, with 70 unisex options. O actually skews slightly masculine in total count — making it unusual among vowel-initial letters, which usually lean feminine.
Cultural Diversity of O Names
Latin names anchor the top of the O list: Olivia, Oliver, and Olive. Irish and Welsh names Owen, Oscar, and Orla bring Celtic heritage. Arabic names Omar, Osama, and Omran contribute depth from Islamic traditions. Yoruba names — Ola, Olusegun, and Oluwaseun — represent a significant West African naming tradition. Scandinavian names Olaf and Oskar add Norse character.
Browse All O Names
Ready to explore all 658 names starting with O?
bnn-editorial
Baby Names Network contributor