243 Unisex Names That Start With O (With Meanings and Popularity)
Updated Fri Jan 30 2026
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Unisex names that start with O are flying high in the style stakes right now, with other O-starting choices like Oliver and Olivia, Owen and Oaklynn at an all-time high.
Two up-and-coming unisex O names, Oakley and Ocean, rank among the most popular unisex names to achieve an almost-equal gender split, making either one an awesome androgynous choice.
Here, our full selection of unisex names that start with O, ordered by their current popularity on Nameberry. Each name is used more often for the gender indicated by its heart.
RELATED:
- Olivia
Origin:
LatinMeaning:
"olive tree"
- Oliver
Origin:
Germanic, LatinMeaning:
"elf army; ancestor's relic; olive tree"
- Otto
Origin:
GermanMeaning:
"wealthy"
- Oscar
Origin:
English or IrishMeaning:
"God spear, or deer-lover or champion warrior"
- Owen
Origin:
WelshMeaning:
"young warrior; well-born"
- Ophelia
Origin:
GreekMeaning:
"help"
- Olive
Origin:
English, from Latin, nature nameMeaning:
"olive tree"
- Orla
Origin:
IrishMeaning:
"golden princess"
- Otis
Origin:
Variation of Otto, GermanMeaning:
"wealthy"
- Orion
Origin:
GreekMeaning:
"boundary, limit"
- Odessa
Origin:
Russian form of Odesa, Ukrainian place-nameMeaning:
"voyage"
- Ozzy
Origin:
Pet form of Oswald, Osborn, Osmond or Oscar, EnglishMeaning:
"divine; deer"
- Octavia
Origin:
LatinMeaning:
"eighth"
- Oakley
Origin:
EnglishMeaning:
"oak wood or clearing"
- Oberon
Origin:
Variation of AuberonMeaning:
"elf king; noble bear"
- Opal
Origin:
SanskritMeaning:
"gem"
- Onyx
Origin:
Word nameMeaning:
"gem stone; claw, nail"
- Oren
Origin:
HebrewMeaning:
"laurel or pine tree"
- Orin
Origin:
Variation of Oren or Oran, Hebrew, Irish, ScottishMeaning:
"laurel, light, song, little green one"
- Orlando
Origin:
Italian variation of RolandMeaning:
"famous throughout the land"
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