Boy Dog Names That Start With O

  1. 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.
  2. Oliver
    • Origin:

      Germanic, Latin
    • Meaning:

      "elf army; ancestor's relic; olive tree"
    • Description:

      Oliver is an international star, ranking near the top of the charts throughout the English-speaking world and in a host of European and Latin American countries, from Norway to Chile, Slovenia to Switzerland. Why? Because Oliver is energetic and good-natured, stylish but classic, with a meaning symbolizing peace and fruitfulness.
  3. Owen
    • Origin:

      Welsh
    • Meaning:

      "young warrior; well-born"
    • Description:

      Owen, a resonant Celtic name, has ranked among the Top 100 boys' names in the US for 20 years and is now at its highest point ever.
  4. 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.
  5. Orion
    • Origin:

      Greek
    • Meaning:

      "boundary, limit"
    • Description:

      Orion is a rising star, with both mythical and celestial overtones.
  6. Ozias
    • Origin:

      Greek, Hebrew
    • Meaning:

      "my strength is God"
    • Description:

      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 is five times more popular than it was in 2014.
  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. 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.
  9. Odin
    • Origin:

      Variation of Óðinn, Old Norse
    • Meaning:

      "god of frenzy; poetic fury"
    • Description:

      Odin is the name of the supreme Norse god of art, culture, wisdom, and law — who was handsome, charming, and eloquent into the bargain. The name projects a good measure of strength and power and has excellent assimilation potential.
  10. 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.
  11. 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.
  12. 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, its nature-based meaning, its surname-y feel, and its popular -lee ending, it's not wonder Oakley is on the rise.
  13. Oberon
    • Origin:

      Variation of Auberon
    • Meaning:

      "elf king; noble bear"
    • Description:

      The Shakespearean character Oberon in A Midsummer Night's Dream is King of the Fairies, but the name, with its bold 'O' beginning has plenty of strength alongside its magical qualities.
  14. 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.
  15. Oran
    • 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".
  16. Orlando
    • Origin:

      Italian variation of Roland
    • Meaning:

      "famous throughout the land"
    • Description:

      Orlando, the ornate Italianate twist on the dated Roland, with a literary heritage stretching back to Shakespeare and before, has appealing book-ended o's, and is open to combination with almost any last name, a la British actor, Orlando Bloom.
  17. Omar
    • Origin:

      Arabic, Hebrew
    • Meaning:

      "flourishing, thriving; eloquent"
    • Description:

      A multicultural choice with an appealing open O sound, Omar blends stately strength with familiarity. Also transcribed as Umar, it is a popular choice among Muslim families and features in the name charts across the globe.
      Long associated with the twelfth-century Persian poet, Omar Khayyam, Omar derives from the Arabic umr meaning "life", though is typically interpreted as meaning "flourishing, thriving" and "long living", making it an aspirational choice. In Islamic tradition, Omar (or Umar) was the second caliph (a religious ruler) and companion of the Prophet Muhammad.
  18. Oslo
    • Origin:

      Norwegian place name, Old Norse
    • Meaning:

      "meadow at the foot of a hill"
    • Description:

      Oslo, the capital city of Norway, makes for an intriguing new place name, especially with its bookended O's, as in Otto and leads to cool nickname Ozzie. One Berry has already used it and we predict others will follow; in fact, stats suggest it is used eight times more often than it was a decade ago.
  19. Oswald
    • 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.
  20. Oz
    • Origin:

      Hebrew, English, Irish
    • Meaning:

      "strength, powerful, courageous; god's warrior; deer friend"
    • Description:

      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 a stand-alone choice which may appeal to those who enjoy the likes of Ty, Ed, Bo, and Cy.