User-created list
The Master List - O
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The names
Olive
English, from Latin, nature name
"olive tree"
Though greatly overshadowed by the trendy Olivia, Olive has a quiet, subtle appeal of its own -- and is now enjoying a remarkable comeback. Olive is one of only four girl names starting with O on the…
Ophelia
Greek
"help"
Floral, elegant, and bold, Ophelia re-entered the US Top 1000 in 2015 after more than 50 years off the charts. It has risen more than 700 spots since then and shows no signs of slowing down. Now in…
Otto
German
"wealthy"
Otto is cool again. Long a quintessential Old Man Name, Otto has been promoted to trending darling of adventurous baby namers. Like most German names , Otto fell out of favor during and after the two…
Onyx
Word name
"gem stone; claw, nail"
Unlike Pearl and Ruby and more like Jasper, this gem name works well as a boys name. With its strong final X, it feels similar to Alex, Phoenix, Jax, and Rex, while the shiny black quality of the…
Ozias
Greek, Hebrew
"my strength is God"
A cool Biblical option that entered the US Top 1000 for the first time ever in 2024, Ozias gets extra points for its user-friendly nicknames Oz and Ozzie or Ozzy. Given to around 280 boys in 2024, it…
Odette
French, from German
"wealthy"
Odette is the good swan in Tchaikovsky's ballet Swan Lake , a role for which Natalie Portman won an Oscar ---and it would make a particularly sophisticated yet upbeat choice. In fact, it charted in…
Oak
English tree name
"tree from the genus Quercus"
Oak, a symbol of solidity, strength, and longevity, is joining Cedar and Pine as a viable name, one that would work especially well in the middle. If you'd prefer to take the longer route to the…
October
Oizys
Olwen
Welsh
"white footprint"
Olwen is a Welsh favorite, the name of a legendary princess in what is believed to have been the earliest Arthurian romance, and in fact one of the first recorded examples of Welsh prose. In this…
Orin
Variation of Oren or Oran, Hebrew, Irish, Scottish
"laurel, light, song, little green one"
Orin is one of a variety of similarly-spelled names that have a soft and sensitive image. The Orrin spelling has been known nationally via Republican Senator Hatch. Orin is the name of a character in…
Osiris
Egyptian
"with strong eyesight"
Osiris is the name of Egyptian mythology god-king who died and was reborn every year. Emerging from centuries of obscurity, Osiris has several ingredients for success in the modern world: Roots in…
Osprey
Otter
Ottilie
German, French
"prosperous in battle"
Ottilie is trending in the UK, where the pronounced T helps the name sound pretty and delicate, rather like Amelie and Elodie. Ottilie is less popular in the US, where many Americans pronounce it as…
Ottoline
French and English, diminutive of Ottolie
"prospers in battle"
Curiously appealing, in a hoop-skirted, wasp-waisted way, Ottoline has recently entered the realm of modern possibility, especially since Sienna Miller chose it as the middle name of her daughter…
Oz
Hebrew, English, Irish
"strength, powerful, courageous; god's warrior; deer friend"
While some may think of ruby slippers and a yellow brick road, Oz is a legitimate Hebrew name denoting power. An element in a number of names including Ozni, Oziel, and Ozias, it may also be used as…