Boy Cat Names That Start With O

  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. 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.
  3. 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.
  4. 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.
  5. Orson
    • Origin:

      Latin and English
    • Meaning:

      "bear cub"
    • Description:

      In the past, Orson has felt like a one-person moniker, tied to film director Orson Welles, who dropped his given name of George in favor of his more distinctive middle. While the Citizen Kane creator seemed to own the name during his lifetime, it's now an interesting possibility for any parent seeking an unusual yet solid name. It's started to appear to the celeb set too -- both Paz Vega and Lauren Ambrose have little Orsons.
  6. 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.
  7. Onyx
    • Origin:

      Word name
    • Meaning:

      "gem stone; claw, nail"
    • Description:

      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 stone feels reminiscent of Orion. Chosen by musician Iggy Azalea for her son in 2020, it has accelerated up the charts and now sits just outside the Top 300.
  8. Oakley
    • Origin:

      English
    • Meaning:

      "oak wood or clearing"
    • Description:

      As sturdy as Oak, but with stronger roots as a first name, Oakley ticks lots of boxes for modern trends. With its unisex vibe, it's nature-based meaning, it's surname-y feel, and it's popular -lee ending, it's not wonder Oakley is on the rise.
  9. 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.
  10. Ozzy
    • Origin:

      Pet form of Oswald, Osborn, Osmond or Oscar, English
    • Meaning:

      "divine; deer"
    • Description:

      Cute but cool, fresh but familiar, Ozzy was one of the fastest-rising boy names of 2021 and has continued to rise in the US and the UK ever since. While hard-core rocker Ozzy Osbourne might not be everyone's idea of a role model, his nickname name, along with others like it (think Iggy, Ziggy and Izzy) are forging their own way up the charts.
  11. 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.
  12. Ocean
    • Origin:

      English, nature name
    • Meaning:

      "ocean"
    • Description:

      Nature names like Ocean and River are flowing back into favor, especially with nature lovers and green-oriented parents.
  13. Odysseus
    • 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.
  14. Odie
    • 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.
  15. Oz
    • Origin:

      Hebrew, Irish
    • Meaning:

      "strength, powerful, courageous; deer friend"
    • 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.
  16. Octavius
    • 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. As a Roman family name, it derives from the uncommon forename Octavus, which designated an eighth son.
  17. Ollie
    • Origin:

      Diminutive of Oliver, Latin
    • Meaning:

      "olive tree"
    • Description:

      Down-home nickname name once associated with the friendly dragon on kids' TV. As Oliver rises, we may well hear more Ollies.
  18. Octavian
    • 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.
  19. Obsidian
    • 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.
  20. Orville
    • Origin:

      French
    • Meaning:

      "gold town"
    • Description:

      Only if you're an aviation buff or seriously addicted to popcorn.