baby boy holding letter o

30+ Outstanding Boy Names that Start with O

May 9, 2022

30+ Outstanding Boy Names that Start with O

AHEAD: The ultimate list of O names for boys—plus their meanings and popularity.

If you’re looking for a cool boys’ name starting with the letter O, you’re in the right place!

Below, I’ve rounded up every single O name that’s even the slightest bit modern and cool.

For each name, you’ll find its meaning and current popularity—which will hopefully help you narrow down your list of favorites.

baby boy holding letter o

There are only 16 “O” names ranking in the top 1000.

There are also a bunch of other outstanding O names that are more rare (without being too out there).

Feel free to use the Table of Contents to jump to a specific style, or keep on scrolling and view all of these cool boys’ names starting with the letter O.

Related: Girl Names that Start with O

Boy Names that Start with O

Gender-neutral “O” names

baby boy with animal towel on head

All of these O names would work for a boy or a girl.

Oak

  • Name meaning: Large trees with long lifespans.
  • Popularity: This neutral name isn’t ranking.

Oakland

  • Name meaning: A city on the San Francisco Bay.
  • Popularity: This neutral name isn’t ranking.

Oakley

  • Name meaning: Meadow of oak trees.
  • Popularity: Oakley ranks #403 for boys and #193 for girls.

Ocean

  • Name meaning: Body of water.
  • Popularity: Ocean ranks #711 for boys and #877 for girls.

Octave

  • Name meaning: An interval between music notes.
  • Popularity: This great hippie name isn’t ranking.

Omari

  • Name meaning: Flourishing or long-lived.
  • Popularity: This great rainbow baby name ranks #492 for boys and isn’t ranking for girls.

Onyx

  • Name meaning: A layered black stone.
  • Popularity: #406

If you like these gender-neutral names that start with the letter O you’ll also like this list of nonbinary names.

Cool “O” names

baby boy lying on belly on bed

These boys’ names starting with O are perfect if you want something a little edgy but not too far out there.

Olsen or Olson

  • Name meaning: Son of Olaf or Ole.
  • Popularity: This boys’ name isn’t ranking.

Oren or Orin or Orrin

  • Name meaning: Ash or pine tree. Little pale green one.
  • Popularity: This boys’ name isn’t ranking.

Orson

  • Name meaning: Bear.
  • Popularity: This boys’ name isn’t ranking.

Otis

  • Name meaning: Wealth. Son of Ode.
  • Popularity: #647

Ozzy

  • Name meaning: Short for Oswald, Osborn, or Osmond.
  • Popularity: #712

If you like these cool boy names that start with O you’ll also like this list of edgy names.

Rare “O” names

baby boy sitting with teddy bear

If you’re looking for a boys’ name starting with O that’s off the beaten path, one of these rare choices might be for you!

Octavius

  • Name meaning: Eighth.
  • Popularity: This boys’ name isn’t ranking.

Orlando

  • Name meaning: Renowned throughout the land. A city in Florida.
  • Popularity: #754

Orpheus

  • Name meaning: A musician, poet, and prophet in Greek mythology.
  • Popularity: This boys’ name isn’t ranking.

Osborn

  • Name meaning: Bear of God.
  • Popularity: This boys’ name isn’t ranking.

Osiris

  • Name meaning: Ancient Egyptian god of fertility, agriculture, and the afterlife.
  • Popularity: #948

Osman

  • Name meaning: Many possible meanings including ‘man of God’ and ‘ox driver’. (Prince Osman founded the Ottoman Empire).
  • Popularity: #982

Osmond

  • Name meaning: God protects.
  • Popularity: This boys’ name isn’t ranking.

Oswald

If you like these rare boy names that start with O you’ll also like this list of space names for boys.

Final thoughts on “O” boy names

Hopefully, you’ve found a few lead contenders on this list, or at least come away with some baby name inspiration.

Whether you prefer a name that’s popular, cool, gender-neutral, or rare, all of these boys’ names are fantastic choices.

Congratulations and good luck choosing the perfect name for your son!

Boy Names that Start with O