Cat Names That Start With O

Cat Names That Start With O

Female cat names that start with O currently in the Top 100 cat names include Olive, Oreo, and Olivia. Cat names currently trending on Nameberry include Ophelia, Ottilie, and Odette. Unique female cat names that start with O include Orla, Ocean, and Olwen.

Male cat names that start with O in the Top 100 cat names include Oliver, Ollie, Oscar, Oreo, Otis, Ozzy, and Onyx. Cat names currently trending on Nameberry include Otto, Orson, and Oakley. Unique cat names that start with O include Oberon, Otter, and Orville.

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  1. Oliver
    • Origin:

      Latin
    • Meaning:

      "olive tree or elf army"
    • Description:

      Oliver is an international star, ranking near the top of the charts in the US and throughout the English-speaking world, along with a host of European and Latin American countries, from Norway to Chile, Slovenia to Switzerland.
  2. Olivia
    • Origin:

      Latin
    • Meaning:

      "olive tree"
    • Description:

      Olivia, a lovely Shakespearean name with an admirable balance of strength and femininity, is the Number 1 name for baby girls in the US and one of the top girls' names around the world.
  3. Ophelia
    • Origin:

      Greek
    • Meaning:

      "help"
    • Description:

      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 the US Top 300, could Ophelia one day become the next Olivia or Amelia?
  4. Oscar
    • Origin:

      English or Irish
    • Meaning:

      "God spear, or deer-lover or champion warrior"
    • Description:

      Oscar is one of the most stylish Old Man Names of our era. While it's softened slightly in popularity over the past 20 years, that may be considered a very good thing.
  5. Otto
    • Origin:

      German
    • Meaning:

      "wealthy"
    • Description:

      Otto is cool again. Long a quintessential Old Man Name, Otto has been promoted to trending darling of adventurous baby namers.
  6. Ottilie
    • Origin:

      German, French
    • Meaning:

      "prosperous in battle"
    • Description:

      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 a near-homonym for "oddly".
  7. Otis
    • Origin:

      Variation of Otto, German
    • Meaning:

      "wealthy"
    • Description:

      Otis has real appeal for parents attracted to its catchy O initial and combination of strength and spunk. The appealing hero of the British TV show Sex Education has done much to propel Otis into the forefront of cool names.
  8. Olive
    • Origin:

      English, from Latin, nature name
    • Meaning:

      "olive tree"
    • Description:

      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 US Top 1000. Cool couple Isla Fisher and Sacha Baron Cohen chose it for their daughter, reviving the name to stylishness, and now Drew Barrymore has a little Olive too, as has country singer Jake Owen.
  9. Odette
    • 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.
  10. Orson
    • 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.
  11. Oona
    • 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.
  12. Onyx
    • Origin:

      Gem name
    • Description:

      Unlike Pearl and Ruby, this is one gem name suited for boys, the final x making it sound strong and virile. Musician Iggy Azalea chose the name Onyx for her son.
  13. Oberon
    • 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.
  14. Orla
    • 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.
  15. Octavia
    • Origin:

      Latin
    • Meaning:

      "eighth"
    • Description:

      Octavia began as the Latin, then Victorian name for an eighth child. While there aren't many eighth children anymore, this ancient Roman name has real possibilities as a substitute for the overused Olivia; recommended for its combination of classical and musical overtones. It was chosen for his daughter by Kevin Sorbo.
  16. Opal
    • Origin:

      Sanskrit
    • Meaning:

      "gem"
    • Description:

      Opal is on the verge of a repolishing, following other jewel names like Ruby and Pearl. A Top 100 name during the first two decades of the twentieth century, the opalescent Opal has a good chance of coming back as another O-initial option.
  17. Oakley
    • Origin:

      English
    • Meaning:

      "oak wood or clearing"
    • Description:

      As sturdy as Oak, with deeper roots. It's been on the rise for both boys and girls in recent years, with the name comfortably in the top 500 for boys and nearing the Top 100 for girls.
  18. Osiris
    • Origin:

      Egyptian
    • Meaning:

      "with strong eyesight"
    • Description:

      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 ancient myth, an uplifting meaning, an s ending and the cute nickname Os or Oz.
  19. Orpheus
    • 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.
  20. Ozzy
    • 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. Ozzy was one of the fastest-rising boy names of 2021.