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Unique Names Starting with O

Unique names starting with the letter O encompass both unusual names with traditional pedigrees and unconventional names that are also rare.

Unusual yet traditional names for boys starting with the letter O include the ancient Greek Ozias and the Egyptian mythological Osiris.

For girls, uncommon tradtional names starting with O include the mythological Olympia and the Irish Orla.

Unique names starting with O that have unconventional roots include the tree name Oak for both genders and the adaptation of any Celtic last name starting with O': O'Brien, O'Hara, and so on.

Here are all Nameberry's unique names, ranking below the US Top 1000, that start with the letter O.

OttilieHeart

  • Origin:

    Feminine variation of German OTTO,
  • Meaning:

    "prosperous in battle"
  • Description:

    Ottilie and its diminutive Ottiline are a pair of names heard among the British upper crust, but have rarely been seen here since the 1880's. Though it has German roots via Otto, Ottilie has a distinctively delicate French feel.

OdetteHeart

  • Origin:

    French, from German
  • Meaning:

    "wealthy"
  • Description:

    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 soigne, sophisticated yet upbeat choice, unlike some of the more dated other 'ette'-ending names.

OrlaHeart

  • Origin:

    Irish
  • Meaning:

    "golden princess"
  • Description:

    Orla is an Irish name closely associated with the high king Brian Boru, as it was the name of his sister, daughter and niece. It was very popular in the Middle Ages – the fourth most popular name in twelfth century Ireland – and has become popular again in Ireland, Scotland, England and Wales today. In Irish, the name is commonly spelled Orlaith or Orlagh.

OrsonHeart

  • Origin:

    Latin and English
  • Meaning:

    "bear cub"
  • Description:

    Orson has had in the past a rotund teddy-bear image, a la Orson Welles, who early on dropped his common given name of George in favor of his more distinctive middle one, and who seemed to own it during his lifetime. No longer a single-person signature, it's now an interesting possibility for any parent seeking an unusual yet solid name. It's started to appear to the celeb set--both Paz Vega and Lauren Ambrose have little Orsons.

OziasHeart

  • Origin:

    Greek
  • Meaning:

    "salvation"
  • Description:

    Everyone says they want an unusual name — well, if you truly do, this is one with Biblical cred that fits the bill, with the added attraction of the user-friendly nickname of Oz or Ozzie. Ozias is the name of several minor figures in the Bible. Osias is another spelling.

OisinHeart

  • Origin:

    Irish
  • Meaning:

    "little deer"
  • Description:

    Oisin is one of the most popular Irish baby names in its native land, though largely unknown in the US. The original Oisin was the mythological son of Finn McCool and Sadb, the goddess who was changed into a deer. A legendary war hero and poet, Oisin had a name that is also reminiscent in sound of the ocean. Pronounced correctly, this name has an attractive sheen.

OrenHeart

  • Origin:

    Hebrew
  • Meaning:

    "laurel or pine tree"
  • Description:

    Soft and sensitive name often heard in Israel.

OonaHeart

  • Origin:

    Irish, variation of Una
  • Meaning:

    "lamb"
  • Description:

    Oona is a name made famous by Eugene O'Neill's daughter, who became Charlie Chaplin's wife. One of the original Oona's granddaughters was named after her, and is now an actress famous in her own right for playing Talisa of Volantis in HBO's "Game of Thrones." The double-o beginning gives their name a lot of oomph.

OberonHeart

  • Origin:

    Variation of Auberon
  • Meaning:

    "noble, bearlike"
  • Description:

    The Shakespearean character Oberon in A Midsummer Night's Dream is King of the Fairies, but the name, with its strong 'O' beginning, projects a far more virile image than that.

OzzyHeart

  • Origin:

    Pet form of Oswald, Osborn and Osmond.
  • Description:

    Hard-core rocker Ozzy (born John) Osbourne might not be everyone's idea of a role model, but his nickname name, along with others like Iggy and Izzy, are now being used occasionally.

OdessaHeart

  • Origin:

    Russian place-name
  • Description:

    Odessa, a Ukrainian port city, was given its name by Russia's Catherine the Great, who was inspired by Homer's Odyssey. It would make an original and intriguing choice.

OrinHeart

  • Origin:

    Variation of Oren or Oran
  • Description:

    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.

OctaviusHeart

  • Origin:

    Latin
  • Meaning:

    "eighth"
  • Description:

    Octavius, which was at one time used for the eighth child in a family, has the worn leather patina of all the ancient Roman names now up for reconsideration.

OranHeart

  • Origin:

    Hebrew, Irish, Scottish
  • Meaning:

    "light, song, little green one"
  • Description:

    A calm and gentle multicultural choice. Oran is popular in Ireland, where its Gaelic form is Odhrán, meaning "little green one". In Scottish Gaelic, the name means "song", and in Hebrew, it's a combination of Or "light" + Ran "singing".

OakHeart

  • Origin:

    English tree name
  • Meaning:

    "tree from the genus Quercus"
  • Description:

    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.

OrpheusHeart

  • Origin:

    Greek mythology name
  • Meaning:

    "the darkness of the night"
  • Description:

    Name of the legendary ancient Greek poet and musician — whose music was so beautiful it made trees dance and rivers stop to listen — would provide a child with a challenging but indelible identity.

OlympiaHeart

  • Origin:

    Greek
  • Meaning:

    "from Mount Olympus"
  • Description:

    With its relation to Mount Olympus, home of the Greek gods, and to the Olympic games, this name has an athletic, goddess-like aura, making it the perfect Olivia substitute.

OllieHeart

  • Origin:

    Diminutive of Oliver
  • Description:

    Down-home nickname name once associated with the friendly dragon on kids' TV.

OrianaHeart

  • Origin:

    Latin
  • Meaning:

    "dawn"
  • Description:

    Oriana is a dashing medieval name, with a meaning similar to Aurora. At this point, though, Oriana is much more unusual than Aurora and makes a unique choice if you're searching for names that mean new beginnings or dawn.

OzzieHeart

  • Origin:

    Short form
  • Description:

    Ozzie might still be a bit Ozzie & Harriet, but it's a cut short form for Osmond, Oswald, Ozias, or even Oz.

OsloHeart

  • Origin:

    Norwegian place name
  • Description:

    Oslo, the capital city of Norway, makes for an intriguing new place name, especially with its bookended o's, as in Otto. One berry has already used it and we predict others will follow.

ObiHeart

  • Origin:

    African, Nigerian-Ibo
  • Meaning:

    "heart"
  • Description:

    "Return of the Jedi": strongly linked to the complex "Star Wars" character, Obi Wan Kenobi.

OdysseusHeart

  • Origin:

    Greek mythology name
  • Meaning:

    "wrathful"
  • Description:

    The name of the brave, resourceful hero of Homer's epic saga has almost always been considered too weighty for a child to bear, but at this point, some brave, resourceful parents out there might be willing to take it on.

OzHeart

  • Origin:

    Hebrew
  • Meaning:

    "strength, powerful, courageous"
  • Description:

    This may be a legitimate Hebrew name denoting power, but to any American kid, it will evoke ruby slippers and a yellow brick road. The full Hebrew name is Ozni, who was a grandson of Jacob in the Bible.

OriHeart

  • Origin:

    Hebrew
  • Meaning:

    "my light"
  • Description:

    Friendly but substantial.

OswaldHeart

  • Origin:

    English
  • Meaning:

    "divine power"
  • Description:

    Despite the success of so many O-starting boys names--Oliver, Owen, Otis, Oscar--Oswald has not yet shown any signs of resurrection, though he does have the animating nicknames Ozzie/Ozzy and Oz. The name has some literary cred--in Chaucer's Canterbury Tales, Shakespeare's King Lear and a novel by H. G.Wells--and there was early cartoon character Oswald the Lucky Rabbit.

OmriHeart

  • Origin:

    Hebrew
  • Meaning:

    "my sheaf"
  • Description:

    Old Testament name of a king of Israel, related to the harvest.

OthelloHeart

  • Origin:

    Hebrew
  • Meaning:

    "he has the sound of God"
  • Description:

    Shakespeare's moor has exclusive ownership of this name.

OceanHeart

  • Origin:

    Nature name
  • Description:

    Ocean is a nature name that comes right out and states its meaning and association. Full of power and depth, Ocean is rising in usage as a baby name, given to 116 baby girls and 166 baby boys in 2018. Oceane, the version that's trendy in France, was used for only nine baby girls in the US in the same year. Ocean-lovers who want to be less obvious can choose such subtler names that mean ocean as Jennifer or Marissa, but coming right out and using Ocean is a perfectly valid way to go.

OzymandiasHeart

  • Origin:

    Greek variant of Ramesses
  • Description:

    Percy Bysshe Shelley got the name for one of his most famous poems -- a sonnet about the insignificance of man's labors in the vastness of time -- from the Greek name for Ancient Egyptian pharaoh Ramesses II. Ozymandias has seldom been used as a first name for baby boys, and it's not hard to see why. Five ponderous syllables are a lot to bear.

ObadiahHeart

  • Origin:

    Hebrew
  • Meaning:

    "servant of God"
  • Description:

    For the seriously audacious biblical baby namer who wants to move beyond Elijah and Josiah, this name has considerable old-fangled charm. Obadiah, who gave his name to one of the shortest books in the Bible, was a rich man who had the gift of prophecy. There are several other men named Obadiah in the Bible, as well as a Saint Obadiah. There have been two prominent U.S. senators named Obadiah.

OdileHeart

  • Origin:

    French variation of German Otthild
  • Meaning:

    "prospers in battle"
  • Description:

    Odette's evil Swan Lake twin -- gives the name a sinuous, sensuous appeal.

OttolineHeart

  • Origin:

    French and English, diminutive of Ottolie
  • Meaning:

    "prospers in battle"
  • Description:

    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 Marlowe.

OskarHeart

  • Origin:

    German variation of Oscar
  • Description:

    Oskar is to Oscar as Jakob is to Jacob: more distinctive and continental.

OlivierHeart

  • Origin:

    French
  • Meaning:

    "olive tree"
  • Description:

    More and more frequently heard as the Gallic version of Oliver, Olivier could be seen as a tribute to the great British actor, Sir Laurence O.

OndineHeart

  • Origin:

    Latin
  • Meaning:

    "little wave"
  • Description:

    Mythological spirit of the waters; spelled Undine, she was an Edith Wharton heroine.

OdhranHeart

  • Origin:

    Irish
  • Meaning:

    "little pale green one"
  • Description:

    Odhran, Anglicized as Oran, was the name of an ancient saint. Today, Odhran is among the Top 100 Irish names for boys in Ireland.

OceaneHeart

  • Origin:

    French
  • Meaning:

    "ocean"
  • Description:

    Oceane (oh-see-EN) has been one of the chicest names in France for several years, ranking in the French Top 50. This is a sophisticated name that could easily cross the ocean, and is much more stylish than the English Ocean or Oceana.

OnyxHeart

  • Origin:

    Gem name
  • Description:

    One of the few of this class to have a husky boyish sound.

OrionHeart

  • Origin:

    Greek mythology name
  • Description:

    The Greek mythological hunter who was turned into a constellation is much more often used for boys.

OdeliaHeart

  • Origin:

    Hebrew
  • Meaning:

    "I will praise the Lord"
  • Description:

    Pretty Hebrew name that would create a strong but feminine impression.

OctavianHeart

  • Origin:

    Latin
  • Meaning:

    "eighth"
  • Description:

    With the rise of ancient Roman names, Octavian suddenly seem plausible again. A variation of Octavius and relative of the more modern Octavio, it's an equally attractive member of the trio.

OswinHeart

  • Origin:

    Old English
  • Meaning:

    "God's friend"
  • Description:

    Ancient name, near obsolete now, but could make a good alternative to Owen for the adventurous baby namer.

OdieHeart

  • Origin:

    Diminutive of Odell, Otis; English, German
  • Meaning:

    "of the valley; wealthy"
  • Description:

    This old-timey nickname for Otis and Odell is strongly tied to Garfield’s canine companion in the Garfield comic, movie, and TV franchise.

ObsidianHeart

  • Origin:

    English word name
  • Description:

    This rarely used boys name is one of the few gem names for a boy. Obsidian is actually a type of volcanic glass, formed when lava cools very quickly. This ultra-cool name might spark a love of volcanoes and geology in a little boy.

OlgaHeart

  • Origin:

    Russian
  • Meaning:

    "holy"
  • Description:

    This Russian classic still has an international feel. Olga was one of Chekhov's Three Sisters, the name of the saint who was instrumental in spreading Christianity in Russia and the name of one of the USSR's most famous and popular gymnasts, Olga Korbut.

OksanaHeart

  • Origin:

    Russian from Hebrew
  • Meaning:

    "praise to God"
  • Description:

    Ukrainian figure-skating champion Oksana Baiul made it known here.

OrlaithHeart

  • Origin:

    Irish
  • Meaning:

    "golden princess"
  • Description:

    In early, pre-Norman Ireland, this name was borne by both a sister and a niece of high king Brian Boru. Now, the English form Orla is more commonly used.

OrchidHeart

  • Origin:

    From Greek
  • Meaning:

    "orchid flower"
  • Description:

    Orchid is a hothouse bloom that has not been plucked by many modern baby namers — yet. In the language of flowers, orchids symbolize love, beauty, and sophistication.

ObedHeart

  • Origin:

    Hebrew
  • Meaning:

    "servant of God"
  • Description:

    This quirky Old Testament name has potential, as parents are digging deeper into the Bible to find names for their children. It has also been used as a nickname for Obediah.
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